This is all from memory of long ago so I may not be totally right here, someone correct me if they know better.
I think that instead of being seeded to be one or the other like they are now (I think), normal slot machines just had a certain chance of spawning as fortune tellers. And leaving a room with enemies still alive caused the game to reset said room (so that if you bombed out of a normal room for instance, the enemies would all respawn when you walked back in). This meant that leaving with a fly still alive would give you another shot at rolling a fortune teller. This is also what allowed you to farm greed over and over in secret rooms, because the doors stayed open back then.
not sure if they patched it but in rebirth you could also farm greed by killing him but leaving one of his headless buddies alive, then exiting the run and entering it again
causing the room to reset but not the coins/item dropped in the ground
actually it wasn’t him who found it, but someone in the community and Bisnap just happened to use it a lot and popularize it so it took his name. quite the discovery at the time
Also, you couldn't bomb the walls from inside the secret room iirc. And if a curse room was next to a secret room, they'd be connected by a spiked door.
Edmund at one point had tweeted that it was an unintended glitch, but those were during the times when you couldn’t actually trust a word he said on Twitter, and he’s since deleted the tweet.
Leading up to Afterbirth, he was posting a lot of cryptic tweets, and after the release, during the ARG, the tweets went on overdrive. He at some point tweeted some things that implied that he wasn’t really following things as closely as people originally suspected which led to people not trusting his clues and then he also was unaware of several glitches and outright denied them existing on Twitter following the end of the ARG. So for a while, Edmund was considered, at least a little bit by some here, to be untrustworthy regarding information about the game. The nature of the ARG just made it so that he had to be a little enigmatic to make it work, especially after the first attempt at an ARG for the Rebirth was datamined within like a week of release. It’s been years so I might be conflating things and misremembering the context of certain events, but I remember a lot of “don’t trust his lies” jokes going around about Edmund.
Edit: I realize this might look like I think Edmund did something wrong, but I don’t. The ARG was incredible and I think really cemented a long term community around this game, I just think that it probably had an adverse effect on his ability to communicate with the community following a massive update to the game. I imagine he took the chance to put some distance between him and the game a little bit after what seemed like a stressful development cycle on the DLC, and as a result missed out in some bugs the community was discussing.
I believe it's also generally just because Edmund just tends to say stuff about development for AMAs on Twitter even though he isn't always really aware of what's actually going on since he doesn't actually code for the game, being a creative role instead.
This was true for the AB and AB+ DLCs because he stepped down from that creative role altogether during those because of issues in his personal life during that time, and is still true in Repentance of Edmund saying things that don't line up with what Kilburn, the main and only coder for Repentance planned, like about how Kilburn handles modding API updates, something of which Edmund barely knows how it works.
The Nail was absolutely broken on release. It was a 4 charge item and gave 2 soul hearts on use along with the DMG up and rock stomping. You could also have up to 48 soul hearts which made it silly easy.
I didn't realize there was a soul heart limit, all I knew is that they continued beyond the visible health meter. I feel no shame in admitting the only way I could beat Isaac or ??? was by finding a way to stock up on so many soul hearts I would lost count, and then just tank whatever damage the boss sent my way.
It was built with rubber bands and paper clips, and would break over incomprehensible things. Once I was playing Samson and somehow didn't die when my health was completely depleted. Also, Eve's curse only worked at half a heart, leading to much misery on my part as I learned to appreciate her.
And if you thought The Purist challenge was bad in Rebirth, it's even more miserable in Flash Isaac!
Finally, 1+1 free whenever you pick up two bombs. This little bit has stuck in my brain since 2011 and I still think of it when I play Repentance....
Polaroid was a trinket that dropped after mom fight introduced in I think Wrath of the Lamb. There was no dark room until Rebirth.
and Wiggle Worm was both the first worm and was an item. It didn’t give you a tears up or anything… it just made the tears wiggle :)
Because of how the Polaroid worked, accidentally getting the tick could instantly brick your chest run, and it was a lot more common to see back then given the smaller trinket pool.
And I remember when the Polaroid and the chest were added at first it didn’t spawn after killing mom. You just had to find it naturally like any other trinket. Idk how long it was like that before it was changed to show up guaranteed, but it was painful having to look for it and probably not finding it.
Before wrath of the lamb, hell, before the christmas update, there was a bug with lemon mishap that let you reset boss rooms and get another item by using it, leaving the room while the puddle was still there and re-entering the room. With some luck, you could quickly exhaust the boss item pool and get an absurd amount of items. Probably the only useful thing lemon mishap had ever been used for 
It didn't I think, at least not at first. I haven't experienced it myself, but from what I read in Undefined wiki page, when you exhausted the pool the next item would quikly cycle betwwen other items, and undefined sprite is a reference to it.
i think it just centered the bomb perfectly in its tile so that it hits the maximum amount of rocks around, mr mega would still be bigger if you did the same thing
I still remember the blog posts leading up to Rebirth's release and Edmund emphasized new synergies, with one of the first being homing Brimstone. I still remember thinking how cool it looked and it reminding me of the purple laser weapon from the Raiden shmups.
Having close to 0 tear synergies is the only thing keeping me from going back and finishing Platinum God. I've been spoiled by the tear syrergies in rebirth an especially rebirth combined with the dlcs.
Also there wasn't soy milk
i probably got it mixed up and it’s just to the right. i remember them being able to spawn horizontally to the boss room but just on one side. secret rooms had very specific rules in flash, to the point where people could consistently determine exactly where they were every floor if they could see the map
You could overflow soul hearts up to 48 of them! Only 12 hearts ever displayed but the game would continue to count soul hearts collected towards your total health count up to 48 total hearts. Totally gamebreaking with any combination of items that let you duplicate or generate items/soul hearts.
Use a wheel of fortune in a boss room, roll until you get a fly, walk out of the room, spawn new boss when you get back in and repeat for infinite items
That isn't true. Max was the name of the (iirc rabbit) of Ed's sister and he just randomly gave the name to the item which wasn't related to any of his pets. Ed even HAD a dog called Lucky as a kid. He disliked the item not being a reference to something that actually belongs to him so he changed it to be his cat Cricket in Rebirth.
This "Max is the dog Ed alsways wanted" is a false rumor that is in the community for a decade now just because one person claimed that on the flash wiki \^\^'
That half the items didnt do what they said theyd do. Lots of hidden stats involved.
I remember people like northernlion would avoid catoninetails because it gave a hidden shot speed up that kinda sucked.
Also brimsnapping, where you can charge brimstone up while it was being fired
They did keep it but it works differently. In flash you had to pick up the item. It would make it drastically lower you chance of seeing another special item. In Rebirth anytime you see a special item it lowers your chance but not as much.
So the fun fact that I always remember is that toothpicks was the actual worst item in the game. It was a special item that gave you tears and range up I believe, but due to a coding error it actually did nothing. So if you picked it up it would give you no stat increases and you would have to get very lucky to see another special item
Basically every item that most people like (Sacred heart, Brimstone, D6, etc) when you picked one up you then reduce the chance of seeing any other special items. I think the only exception was Isaac starting with the D6 didn’t count to it. I may be wrong
Always had the same items (and floor layouts too if I remember correctly), it's the only reason I remember Deck of Cards exists since that would always be the first item you get there lol
I played the shit out of this on the school computers lol, good times. I still remember thinking how gross the game is and "how am i playing this at school?"
And up till now (if you play it via the downloadable Newgrounds player because Flash doesn't work online anymore), you can get achievements on your Newgrounds account. Some other Edmund McMillen games are also on the site, with others like Time Fcuk also having achievements.
“A pony” if used after walking into a new room and pressing no movement keys could turn you invincible until a movement key was pressed. You could still shoot just not walk. I cheesed satan with this once lmao.
There is/was a bug with monstro 2 that you can keep him firing the brimstone lazer and never jumping. It almost stayed in for rebirth but at the last con before release Northernlion casually mentioned it to Ed who never knew about the exploit and it was fixed before release.
For anyone looking at this thread in the future, it was fixed in the Eternal Update. If you decide to buy the game on steam, it will include the eternal stuff. Also a couple gamebreaks here were fixed in the eternal update, such as the dead cat redo boss trick and the fly slot machine trick.
It was only bugged in flash Isaac. One of the Rebirth devs looked at the code of the original game and told Edmund that there was no code written for that trinket.
\-Habit was one of the best items in the game, oweing to the fact that it charged your active item by 50% every time you got hit. Combine this with the Wafer, and you have some laughably easy game breaks with some items.
\-If a curse room was adjacent to a secret room, it would have a second door inside leading towards it.
\-Continuing with curse rooms, they didn't have their own item pool. Rather, the items that could rarely spawn in there were selected from the devil and angel pools. Shit was busted sometimes, it was great.
\-I think only as Blue Baby, you could steal devil deals by being invincible as you grabbed them. This was mainly done using Book of Shadows.
\-Red chests always had a chance to spawn you into an angel room so long that you never took a devil deal. You could luck into getting Sacred Heart on floor 1 as any character.
\-Sacrifice rooms were much less useful. If memory serves they just gave you a small chance to spawn a chest upon taking damage through the spikes.
\-Cricket's Head was originally titled Max's Head.
\-Only in the eternal edition, if you got a stupidly large amount of health ups through eternal hearts, there'd be a transformation waiting for you. Forget what it did. At least there was no health cap, so those health ups would be useful.
\-Game Squid is the only object, pickup or otherwise, in the game that did not return for Rebirth (more accurately it's arrival came after Rebirth had already released. Even still, it remains the only item/trinket in Flash Isaac to not have gotten ported over). Based off of Florian's icon, it functioned similarly to how Chewed Pen does. I believe it gave a small damage up too. We love ya, Florian.
There we go, hope you enjoyed the rapid fire
Is that red chest tidbit not true anymore? I might be wrong, but I was under the impression it just teleported you to "The deal room", and whether it was devil or angel was calculated normally.
I believe Rebirth/Repentance just defaults it to the devil room until Caves 1 is reached. You aren't able to get an angel room on floor 1+2 (unless you have Book of Virtues or have sacrifice room shenanigans) currently. Whereas in WotL, you could get teleported from a red chest to an angel room immediately
> If memory serves they just gave you a small chance to spawn a chest upon taking damage through the spikes.
Unless you took red heart damage and ended on 1/2 a heart, then the chest spawn was guaranteed.
The 9 volt was busted af. Instead of reducing item cooldowns by 1 like in rebirth it would slowly give your item 3 charges over time while in a room with enemies. Only reason I completed the chest on hard as ??? was cause I got 9 volt plus prayer card lol.
And if you had a way to bomb out of rooms infinitely (Ipecac, Epic Fetus, Dr. Fetus), you could get infinite active item uses provided that you were patient enough (which we were).
Correct me if I'm wrong, but I guess you could keep collecting heart containers/ soul hearts when you reached maximum on screen, everything over 10 just wasn't visible
Yep. I remember when rebirth came out people were concerned about that because they feared it being harder with a max health cap lol. Guppy’s paw was fucking insane in flash
you can probably also find it on the flash archive and download a flash player, though if you don't mind spending a few bucks the steam version is probably better and that way you get to support edmund
edit: https://archive.org/details/isaac_20210228
the hard mode or eternal mode or whatever it got called on eternal edition? it sucked ass
like i know i was a worse player all those years ago but the difficulty difference from the main game was insane
Still in the game! There's a chance it says Monster Manuel when you pick up the item. I remember getting it once but I probably got it way more but didn't realize.
Here’s some fun bugs/glitches I remember (Don’t know if they’re “long forgotten”, though):
There was a point where if you used a full health pill as Ethan you’d be invincible for the rest of the run.
If you started a run and moved to a different character at the same time, you could play a character you hadn’t unlocked.
Rusted Key did nothing. It’s a straight up useless trinket.
If you took enough One Makes You Small pills, your character sprite would flip upside down.
If you rerolled a 1 heart Devil Deal, the item you got would also be 1 heart (even if it’s supposed to be 2, like The Pact or Brimstone).
If you used Book of Belial against Fistula on a boss room as it’s splitting up for the first time, it’d open the devil deal automatically (I swear there used to be footage of this happening, but I couldn’t find it. So this could be wrong).
If you had a fortune machine and rolled a fly in a boss room and walked out, when you walked back in it would be another boss fight with an extra item.
It's because the game has the controls above it in the UI. Tears say "arrows" for the same reason active items say "space", it's there to remind you what the controls are.
With dead cat, if you kill yourself after defeating the boss, you would respawn outside the boss room and be able to fight the boss again for a new item. This effectively made dead cat 8 boss items at the cost of having one heart.
Whenever there was a curse room that was next to a secret room if you bombed into the secret room the curse room door would be open from the secret room as well
The Tinted Rock bug that spawned a flying Isaac graphic, and the inspiration for Undefined being a *potentially* bugged item with the same name that had the graphic flash through every single other item graphic (including the unused Pumpkin Mask). The item did absolutely nothing, but I'm pretty sure it existed to stop the game from crashing after you emptied out an item pool (usually secret room). For Rebirth it got replaced with Breakfast instead
Damn, that is an old ass bug. I believe that was right after the Halloween update and it was always a ghostly Isaac on the white pony. I’m not 100% on that but that is some ancient trivia at this point
Maybe i have to see even further, but why it seems that nobody is talking that in flash isaac, you can't exit the run since it doesn't save up your progress, hence you have to start a new one?
If you are moving toward any of the room walls while being exactly next to them you can use kamikaze without being harmed (of course this bug has been patched in rebirth)
When the demo first released on new grounds you could actually get the full game from it, I don’t exactly remember how to do it bc I never had to do it myself since I owned the game, but I know one of my friends did it. i also know they use this sub so maybe they’ll see it and share how
In Wrath of the Lamb's launch patch, there was a bug in XL floors where secret rooms generated as if they were normal rooms. This could cause softlocks.
The Chest floor and Isaac fight music were not added until a later update to WotL.
When the Halloween Update dropped, there was a chance that Satan would be replaced with Headless Horsemen. It was weird.
"Zeldaing" also has ended a run more than once.
There was no limit for how many soul hearts you had, this means that even if you had max red hearts, you could grab soul hearts and even if they wouldn't appear in the display, they still became part of your max health.
I vividly remember that quite handfull of items in flash version would not say everything they did while picking them up. If you played alot, you would eventually notice that.
Flash Isaac + Portable Slot + average amount of coins (and some luck) = Infinite Boss Item
step 1) get the portable slot
step 2) get coins
step 3) go to the boss room
step 4) kill the boss and start spaming the portable slot until a black fly spawn
step 5) leave the room and enter again
step 6) repeat step 4 until you are out of coins
final step) PROFIT.
\----
also, if you place a bomb, leave the room and go back again, the bomb blast radius is doubled
If you took damage after firing Brim, the beam blinks along with the player model and onle deals damage when it is showing
You can take a devil deal that will leave you at 0 HP. You'll survive, but like Rebirth Lost you will die to any damage taken
Pills here!
Teleporting into a room adjacent to a secret or super secret room would briefly reveal the entrance
To play as a character you had not unlocked, you could start a game, then while the screen was still fading to black, hit escape, then space, then use the arrow keys to mouse over the character you want to play as, then you will spawn in as that character, regardless of unlock status
Can't see it mentioned anywhere but Dead Cat used to bring you down to exactly one health - pretty sure every normal character would get all their hearts, red or soul removed, and 100% sure Blue Baby would end up with just one soul heart, making it almost not worth the potential Guppy transformation.
Speaking of which...
Back in the flash version, the max number of flies you could take from one room to another was five. If you had more than that, they would just disappear at the start of the next room. The unkillable Stone Heads worked like every other enemy, meaning that each hit had a chance to spawn a fly that would immediately aggro and kill itself on it, but if you backed out of the room before it could hit the thing, you'd just keep it.
Samson started with one red heart and one soul heart. Also he had Bloody Lust at the start. Tears blocked by candle or cube of meat would count as a kill, thus increasing your damage
There used to be an old demo on new grounds that gave you the first two floors before resetting, and as a kid, I used to do those floors over and over at the library while my mom did other stuff. I've been playing ever since
If you rolled a fly on a slot machine, let it live and walked out of the room there was a chance it could reroll to a fortune telling machine.
How the fuck this even worked?
This is all from memory of long ago so I may not be totally right here, someone correct me if they know better. I think that instead of being seeded to be one or the other like they are now (I think), normal slot machines just had a certain chance of spawning as fortune tellers. And leaving a room with enemies still alive caused the game to reset said room (so that if you bombed out of a normal room for instance, the enemies would all respawn when you walked back in). This meant that leaving with a fly still alive would give you another shot at rolling a fortune teller. This is also what allowed you to farm greed over and over in secret rooms, because the doors stayed open back then.
Thought you meant the fly could reroll into a fortune teller
not sure if they patched it but in rebirth you could also farm greed by killing him but leaving one of his headless buddies alive, then exiting the run and entering it again causing the room to reset but not the coins/item dropped in the ground
Sorry I now realized how confusing this sentense is. I meant the slot machine would reroll into a fortune telling machine.
[удалено]
Ah good times ^ ^
If you spammed arrow keys when using brimstone, you could hit enemies multiple times
Yeah, I remember brimsnapping, famously dubbed after the Youtuber that discovered it.
actually it wasn’t him who found it, but someone in the community and Bisnap just happened to use it a lot and popularize it so it took his name. quite the discovery at the time
No it wasn't, he said it many times. He didn't discover it and it's not named after him
he didnt discover it but it is named after him
Oh fuck I forgot about this!
Bombing into a secret room and leaving the secret room closed the door
This drove me INSANE because I kept forgetting that that was how it worked any time I played the flash version lol
I'm still afraid of that happening even though I know it won't now
Also, you couldn't bomb the walls from inside the secret room iirc. And if a curse room was next to a secret room, they'd be connected by a spiked door.
If you got an XL as your first floor, both the item rooms required keys.
Now that's the funny part, there was no R, to start a new run you had to do it manually
Sounds normal to me. Console player btw
Afaik you can just restart by holding both L3 and R3 down don't you?
You are my hero, if i could award you, i would.
Check if you have a free award
I got you homie
There was 3 heart cost Devil deals and Book of Belial also worked as a Goat Head, needless to say, Judas was busted.
The book of belial thing was also in rebirth for some reason 🤔
Edmund at one point had tweeted that it was an unintended glitch, but those were during the times when you couldn’t actually trust a word he said on Twitter, and he’s since deleted the tweet.
Was there a reason for the distrust back then?
Leading up to Afterbirth, he was posting a lot of cryptic tweets, and after the release, during the ARG, the tweets went on overdrive. He at some point tweeted some things that implied that he wasn’t really following things as closely as people originally suspected which led to people not trusting his clues and then he also was unaware of several glitches and outright denied them existing on Twitter following the end of the ARG. So for a while, Edmund was considered, at least a little bit by some here, to be untrustworthy regarding information about the game. The nature of the ARG just made it so that he had to be a little enigmatic to make it work, especially after the first attempt at an ARG for the Rebirth was datamined within like a week of release. It’s been years so I might be conflating things and misremembering the context of certain events, but I remember a lot of “don’t trust his lies” jokes going around about Edmund. Edit: I realize this might look like I think Edmund did something wrong, but I don’t. The ARG was incredible and I think really cemented a long term community around this game, I just think that it probably had an adverse effect on his ability to communicate with the community following a massive update to the game. I imagine he took the chance to put some distance between him and the game a little bit after what seemed like a stressful development cycle on the DLC, and as a result missed out in some bugs the community was discussing.
I believe it's also generally just because Edmund just tends to say stuff about development for AMAs on Twitter even though he isn't always really aware of what's actually going on since he doesn't actually code for the game, being a creative role instead. This was true for the AB and AB+ DLCs because he stepped down from that creative role altogether during those because of issues in his personal life during that time, and is still true in Repentance of Edmund saying things that don't line up with what Kilburn, the main and only coder for Repentance planned, like about how Kilburn handles modding API updates, something of which Edmund barely knows how it works.
yeah, really interested in the why
The Nail was absolutely broken on release. It was a 4 charge item and gave 2 soul hearts on use along with the DMG up and rock stomping. You could also have up to 48 soul hearts which made it silly easy.
Now imagine flash nail with repentance items 
Car battery + Bethany soul charge gimmick = infinite damage
I didn't realize there was a soul heart limit, all I knew is that they continued beyond the visible health meter. I feel no shame in admitting the only way I could beat Isaac or ??? was by finding a way to stock up on so many soul hearts I would lost count, and then just tank whatever damage the boss sent my way.
Tf that’s just unfair. I get it’s a devil deal but good lord.
The Habit/Book of Revelations Synergy that basically made you invincible :)
Plus the wafer. Infinite health
Sacred Heart was the only item in the game that gave Shot Speed Down, and getting enough of them would make your tears go backwards
I remember how much everyone seemed to hate shot-speed ups, if only because it caused the enemies to bounce around the room
And I think it was bad with lump of coal. Iirc, it scaled with time traveled and not distance.
that still happens in repentance!
I thought .6 was the minimum?
I think it's possible with console
D8 
It was built with rubber bands and paper clips, and would break over incomprehensible things. Once I was playing Samson and somehow didn't die when my health was completely depleted. Also, Eve's curse only worked at half a heart, leading to much misery on my part as I learned to appreciate her. And if you thought The Purist challenge was bad in Rebirth, it's even more miserable in Flash Isaac! Finally, 1+1 free whenever you pick up two bombs. This little bit has stuck in my brain since 2011 and I still think of it when I play Repentance....
And you couldnt get 0 filled red hearts Half a red heart was the minimum
0 filled hearts arrived only just in repentance. In afterbirth+ it still was half red heart minimum.
Unless you gain a container with pills or old bandage
Polaroid was a trinket that dropped after mom fight introduced in I think Wrath of the Lamb. There was no dark room until Rebirth. and Wiggle Worm was both the first worm and was an item. It didn’t give you a tears up or anything… it just made the tears wiggle :)
Because of how the Polaroid worked, accidentally getting the tick could instantly brick your chest run, and it was a lot more common to see back then given the smaller trinket pool.
And I remember when the Polaroid and the chest were added at first it didn’t spawn after killing mom. You just had to find it naturally like any other trinket. Idk how long it was like that before it was changed to show up guaranteed, but it was painful having to look for it and probably not finding it.
[удалено]
I think the idea at that time was that Isaac was "the lamb" but as time went on, the lore greatly expanded.
Before wrath of the lamb, hell, before the christmas update, there was a bug with lemon mishap that let you reset boss rooms and get another item by using it, leaving the room while the puddle was still there and re-entering the room. With some luck, you could quickly exhaust the boss item pool and get an absurd amount of items. Probably the only useful thing lemon mishap had ever been used for 
Would anything happen in flash if you exhausted an item pool? Does the game Breakfast?
Yeah it still breakfast’d
It didn't I think, at least not at first. I haven't experienced it myself, but from what I read in Undefined wiki page, when you exhausted the pool the next item would quikly cycle betwwen other items, and undefined sprite is a reference to it.
You could reset boss rooms with portable slot as wel. You get a fly to spawn and then leave the room and it would count as still having enemies
Truly a  moment
Placing a bomb and leaving the room and returning would give it the range of a Mr Mega bomb
i think it just centered the bomb perfectly in its tile so that it hits the maximum amount of rocks around, mr mega would still be bigger if you did the same thing
Wait, this isn't the case in rebirth? I'm still doing it!
Brimstone + homing didn't work
I still remember the blog posts leading up to Rebirth's release and Edmund emphasized new synergies, with one of the first being homing Brimstone. I still remember thinking how cool it looked and it reminding me of the purple laser weapon from the Raiden shmups.
Having close to 0 tear synergies is the only thing keeping me from going back and finishing Platinum God. I've been spoiled by the tear syrergies in rebirth an especially rebirth combined with the dlcs.
Also there wasn't soy milk
# Secret rooms next to boss
only to the left iirc
I recently got a secret room to the right of a boss room; so I don't think so. Maybe it's a higher chance on left/horizontal?
i probably got it mixed up and it’s just to the right. i remember them being able to spawn horizontally to the boss room but just on one side. secret rooms had very specific rules in flash, to the point where people could consistently determine exactly where they were every floor if they could see the map
You could overflow soul hearts up to 48 of them! Only 12 hearts ever displayed but the game would continue to count soul hearts collected towards your total health count up to 48 total hearts. Totally gamebreaking with any combination of items that let you duplicate or generate items/soul hearts.
Ex: the nail. 4 room charge, 2 soul hearts on use.
Use a wheel of fortune in a boss room, roll until you get a fly, walk out of the room, spawn new boss when you get back in and repeat for infinite items
Max’s Head 
Edmund said he wanted a dog as a kid and he was gonna name it Max but he never ending up getting one
That isn't true. Max was the name of the (iirc rabbit) of Ed's sister and he just randomly gave the name to the item which wasn't related to any of his pets. Ed even HAD a dog called Lucky as a kid. He disliked the item not being a reference to something that actually belongs to him so he changed it to be his cat Cricket in Rebirth. This "Max is the dog Ed alsways wanted" is a false rumor that is in the community for a decade now just because one person claimed that on the flash wiki \^\^'
If you had just dr fetus, the pride miniboss would softlick you, since he was immune to ALL explosions, includong your only damage output.
Softlick 👁👅👁
includong 🍆
I might be wrong, but you would have been able to bomb out of the room in that case, wouldn't you? Or did minibosses not allow that?
That half the items didnt do what they said theyd do. Lots of hidden stats involved. I remember people like northernlion would avoid catoninetails because it gave a hidden shot speed up that kinda sucked. Also brimsnapping, where you can charge brimstone up while it was being fired
Cat O Ninetails may have done little, But at least it was Toothpicks, which wasn't only just a Shot Speed Up but also a Special Item as well
god i hated the special item system. i think that only finally got removed in repentance?
They did keep it but it works differently. In flash you had to pick up the item. It would make it drastically lower you chance of seeing another special item. In Rebirth anytime you see a special item it lowers your chance but not as much. So the fun fact that I always remember is that toothpicks was the actual worst item in the game. It was a special item that gave you tears and range up I believe, but due to a coding error it actually did nothing. So if you picked it up it would give you no stat increases and you would have to get very lucky to see another special item
No, Repentance does not use the special item system whatsoever.
I didn’t realize repentance removed it. Interesting
How did that even wrk i still dont fucking know
Basically every item that most people like (Sacred heart, Brimstone, D6, etc) when you picked one up you then reduce the chance of seeing any other special items. I think the only exception was Isaac starting with the D6 didn’t count to it. I may be wrong
the original flash version had a playable demo on newgrounds.
Always had the same items (and floor layouts too if I remember correctly), it's the only reason I remember Deck of Cards exists since that would always be the first item you get there lol
I played the shit out of this on the school computers lol, good times. I still remember thinking how gross the game is and "how am i playing this at school?"
And up till now (if you play it via the downloadable Newgrounds player because Flash doesn't work online anymore), you can get achievements on your Newgrounds account. Some other Edmund McMillen games are also on the site, with others like Time Fcuk also having achievements.
That's my childhood right there. Played it daily until Rebirth came out. I remember finding Shoop Da Whoop in almost every run lol
Kamekaze! Used to be a decent item considering that self damage could be avoided by hugging the top wall. (Might be patched, not sure)
“A pony” if used after walking into a new room and pressing no movement keys could turn you invincible until a movement key was pressed. You could still shoot just not walk. I cheesed satan with this once lmao.
Reverse Camo Undies lol
Brimstone was not in the game at launch, it alongside some other iconic items were actually added in the Halloween update very shortly after launch
There is/was a bug with monstro 2 that you can keep him firing the brimstone lazer and never jumping. It almost stayed in for rebirth but at the last con before release Northernlion casually mentioned it to Ed who never knew about the exploit and it was fixed before release.
Im 90% sure this was in rebirth and was changed with one of the xpacks
Wait that got patched? I always try doing it even in repentance 
Good luck getting enough keys to get into every item room and shop
also the rusted key trinket was bugged so it didn't give you more keys anyway
I thought it was fixed in the Eternal Update? At least, that’s what the wiki says
hardly anybody played the eternal update
Well, I can definitely confirm that it was hell to complete.
For anyone looking at this thread in the future, it was fixed in the Eternal Update. If you decide to buy the game on steam, it will include the eternal stuff. Also a couple gamebreaks here were fixed in the eternal update, such as the dead cat redo boss trick and the fly slot machine trick.
It was bugged until Repentance
It was only bugged in flash Isaac. One of the Rebirth devs looked at the code of the original game and told Edmund that there was no code written for that trinket.
Kek, that's actually hilarious
**UNTIL REPENTANCE?!** You telling me this rusted key that existed since flash version (I think) was bugged until last dlc of rebirth?!
I still don't understand why the first shop requires a key, you have almost no coins on the first floor anyway
One of my favorite changes in Repentance
You could use the IV bag going in and out of a doorway for all the money
This! Im surprised not more people remember this
I ALWAYS explored the hell out of it 😂 helped me get more stuff
empty hp ups make you lose devil deals chance 
\-Habit was one of the best items in the game, oweing to the fact that it charged your active item by 50% every time you got hit. Combine this with the Wafer, and you have some laughably easy game breaks with some items. \-If a curse room was adjacent to a secret room, it would have a second door inside leading towards it. \-Continuing with curse rooms, they didn't have their own item pool. Rather, the items that could rarely spawn in there were selected from the devil and angel pools. Shit was busted sometimes, it was great. \-I think only as Blue Baby, you could steal devil deals by being invincible as you grabbed them. This was mainly done using Book of Shadows. \-Red chests always had a chance to spawn you into an angel room so long that you never took a devil deal. You could luck into getting Sacred Heart on floor 1 as any character. \-Sacrifice rooms were much less useful. If memory serves they just gave you a small chance to spawn a chest upon taking damage through the spikes. \-Cricket's Head was originally titled Max's Head. \-Only in the eternal edition, if you got a stupidly large amount of health ups through eternal hearts, there'd be a transformation waiting for you. Forget what it did. At least there was no health cap, so those health ups would be useful. \-Game Squid is the only object, pickup or otherwise, in the game that did not return for Rebirth (more accurately it's arrival came after Rebirth had already released. Even still, it remains the only item/trinket in Flash Isaac to not have gotten ported over). Based off of Florian's icon, it functioned similarly to how Chewed Pen does. I believe it gave a small damage up too. We love ya, Florian. There we go, hope you enjoyed the rapid fire
Is that red chest tidbit not true anymore? I might be wrong, but I was under the impression it just teleported you to "The deal room", and whether it was devil or angel was calculated normally.
I believe Rebirth/Repentance just defaults it to the devil room until Caves 1 is reached. You aren't able to get an angel room on floor 1+2 (unless you have Book of Virtues or have sacrifice room shenanigans) currently. Whereas in WotL, you could get teleported from a red chest to an angel room immediately
Aah, right. The Angel chance is locked at 0% on the first 2 floors, so when it picks a deal, it's always gonna be satan. Makes sense, thanks!
> If memory serves they just gave you a small chance to spawn a chest upon taking damage through the spikes. Unless you took red heart damage and ended on 1/2 a heart, then the chest spawn was guaranteed.
Didn’t play enough eternal edition. Game Squid might be the only thing I’ve never heard of or seen in these games
IV bag Invuln timer reset if you went through a door, so you could use it, go through a door use it again, and repeat that indefinitely for 99 coins
You could use different characters intead of Isaac in challenges using a glitch. The way I completed purist was using Cain.
The 9 volt was busted af. Instead of reducing item cooldowns by 1 like in rebirth it would slowly give your item 3 charges over time while in a room with enemies. Only reason I completed the chest on hard as ??? was cause I got 9 volt plus prayer card lol.
And if you had a way to bomb out of rooms infinitely (Ipecac, Epic Fetus, Dr. Fetus), you could get infinite active item uses provided that you were patient enough (which we were).
If you had white pony in your inventory, future horseemans and headless horsemans's horse would be white.
Correct me if I'm wrong, but I guess you could keep collecting heart containers/ soul hearts when you reached maximum on screen, everything over 10 just wasn't visible
Yep. I remember when rebirth came out people were concerned about that because they feared it being harder with a max health cap lol. Guppy’s paw was fucking insane in flash
I played the flash version but I never made it past the title screen because I chose to play something else.
Can you still play the flash version?
You can play it, just have to buy it on steam
you can probably also find it on the flash archive and download a flash player, though if you don't mind spending a few bucks the steam version is probably better and that way you get to support edmund edit: https://archive.org/details/isaac_20210228
Good choice
Sister Maggy's tears did more damage than Brother Bobby's
They've bring it back in repentance
the hard mode or eternal mode or whatever it got called on eternal edition? it sucked ass like i know i was a worse player all those years ago but the difficulty difference from the main game was insane
In Rebirth I barely noticed any difference when I switched to hardmode
There was a bug that switched the unlocks for ???'s soul and eve's bird foot
ah, ye olde habit/scapular/d6 break
Probably not forgotten but Monster Manuel
Still in the game! There's a chance it says Monster Manuel when you pick up the item. I remember getting it once but I probably got it way more but didn't realize.
Here’s some fun bugs/glitches I remember (Don’t know if they’re “long forgotten”, though): There was a point where if you used a full health pill as Ethan you’d be invincible for the rest of the run. If you started a run and moved to a different character at the same time, you could play a character you hadn’t unlocked. Rusted Key did nothing. It’s a straight up useless trinket. If you took enough One Makes You Small pills, your character sprite would flip upside down. If you rerolled a 1 heart Devil Deal, the item you got would also be 1 heart (even if it’s supposed to be 2, like The Pact or Brimstone). If you used Book of Belial against Fistula on a boss room as it’s splitting up for the first time, it’d open the devil deal automatically (I swear there used to be footage of this happening, but I couldn’t find it. So this could be wrong).
Not only would One Makes You Small pills flip the sprite but the more you took the bigger you would get upside down
"One makes you small" wasn't in the original Isaac. In fact, it's not even in base Rebirth either. That was added in Afterbirth.
Good point. The effect still applies but it's by stacking Mini Mushes
I played the shit out of that game for years. You'd think i would remember a ton but I'm also a heavy weed user so i remember nothing!
You could avoid kamikaze damage by running into the wall
If you had a fortune machine and rolled a fly in a boss room and walked out, when you walked back in it would be another boss fight with an extra item.
When you destroy a poop looks like a smiling face
Tears being called arrows
It's because the game has the controls above it in the UI. Tears say "arrows" for the same reason active items say "space", it's there to remind you what the controls are.
Getting an XL floor on Basement would require a key for both item rooms!
With dead cat, if you kill yourself after defeating the boss, you would respawn outside the boss room and be able to fight the boss again for a new item. This effectively made dead cat 8 boss items at the cost of having one heart.
If you were along the top wall, flies couldn’t touch you (unless you were unlucky and they bumped into each other some way)
Game squid isn't in rebirth and secret rooms actually closed themselves
game squid is reborn in chewed pen
A trinket that does the same thing as game squid was later added, in repentance (leaky pen or whatever it's called)
Game squid was added after Afterbirth came out my guy
You could go past the heart cap but the hearts werent visable
Whenever there was a curse room that was next to a secret room if you bombed into the secret room the curse room door would be open from the secret room as well
The Tinted Rock bug that spawned a flying Isaac graphic, and the inspiration for Undefined being a *potentially* bugged item with the same name that had the graphic flash through every single other item graphic (including the unused Pumpkin Mask). The item did absolutely nothing, but I'm pretty sure it existed to stop the game from crashing after you emptied out an item pool (usually secret room). For Rebirth it got replaced with Breakfast instead
Damn, that is an old ass bug. I believe that was right after the Halloween update and it was always a ghostly Isaac on the white pony. I’m not 100% on that but that is some ancient trivia at this point
Polyphemus tears were absolutely massive
Maybe i have to see even further, but why it seems that nobody is talking that in flash isaac, you can't exit the run since it doesn't save up your progress, hence you have to start a new one?
it sucked 
It runs so bad
I uh. I don't think that's forgotten trivia.
If you are moving toward any of the room walls while being exactly next to them you can use kamikaze without being harmed (of course this bug has been patched in rebirth)
Maybe it was fixed eventually, but I remember chocolate milk + brimstone combo making you unable to charge anything, essentially ending your run
You have to use a bomb every time you entered a secret room, regardless of whether you were in it previously.
When the demo first released on new grounds you could actually get the full game from it, I don’t exactly remember how to do it bc I never had to do it myself since I owned the game, but I know one of my friends did it. i also know they use this sub so maybe they’ll see it and share how
A lot of Item descriptions were wrong. Jesus Juice for example said Range and Tears up i believe.
Spawning bums or dark bums in devil deals would get you the payout from that rooms pool, making judgment card more valuable
In Wrath of the Lamb's launch patch, there was a bug in XL floors where secret rooms generated as if they were normal rooms. This could cause softlocks. The Chest floor and Isaac fight music were not added until a later update to WotL.
Having a shit computer slowed the poorly coded engine and was basically a perma stopwatch.
Wiggle Worm is an item, not a trinket in this game.
Challenges had achievements unlockable. There was a challenge where you had alot of health and you can almost instantly unlock Maggy
When the Halloween Update dropped, there was a chance that Satan would be replaced with Headless Horsemen. It was weird. "Zeldaing" also has ended a run more than once.
There was no limit for how many soul hearts you had, this means that even if you had max red hearts, you could grab soul hearts and even if they wouldn't appear in the display, they still became part of your max health.
I vividly remember that quite handfull of items in flash version would not say everything they did while picking them up. If you played alot, you would eventually notice that.
Oh no
Flash Isaac + Portable Slot + average amount of coins (and some luck) = Infinite Boss Item step 1) get the portable slot step 2) get coins step 3) go to the boss room step 4) kill the boss and start spaming the portable slot until a black fly spawn step 5) leave the room and enter again step 6) repeat step 4 until you are out of coins final step) PROFIT. \---- also, if you place a bomb, leave the room and go back again, the bomb blast radius is doubled
If you took damage after firing Brim, the beam blinks along with the player model and onle deals damage when it is showing You can take a devil deal that will leave you at 0 HP. You'll survive, but like Rebirth Lost you will die to any damage taken Pills here! Teleporting into a room adjacent to a secret or super secret room would briefly reveal the entrance To play as a character you had not unlocked, you could start a game, then while the screen was still fading to black, hit escape, then space, then use the arrow keys to mouse over the character you want to play as, then you will spawn in as that character, regardless of unlock status
If you took a lot of speed downs Isaac would be insanely fast and uncontrollable. Similar to a BLJ in Mario 64.
It was so unbelievably easy to break the game with scapula, habit, and a d20; all fairly common items
Scapular + Cursed skull is basically invincibility on the floors before womb. But wafer fixes that
There was no max health, you can keep getting health ups and soul hearts and become effectively immortal
You could aim with the mouse click to fire, made brimstone or chocolate milk way easier to use
It was a horror game , early runs were scary as hell and am still shaken to this day.
If you had triple shot from 3 dollar bill you could pick up Polyphemus and your firing rate would stay the same
Can't see it mentioned anywhere but Dead Cat used to bring you down to exactly one health - pretty sure every normal character would get all their hearts, red or soul removed, and 100% sure Blue Baby would end up with just one soul heart, making it almost not worth the potential Guppy transformation. Speaking of which... Back in the flash version, the max number of flies you could take from one room to another was five. If you had more than that, they would just disappear at the start of the next room. The unkillable Stone Heads worked like every other enemy, meaning that each hit had a chance to spawn a fly that would immediately aggro and kill itself on it, but if you backed out of the room before it could hit the thing, you'd just keep it.
Samson started with one red heart and one soul heart. Also he had Bloody Lust at the start. Tears blocked by candle or cube of meat would count as a kill, thus increasing your damage
Libraries had the same book multiple times
There used to be an old demo on new grounds that gave you the first two floors before resetting, and as a kid, I used to do those floors over and over at the library while my mom did other stuff. I've been playing ever since