History VideoGame / TheBindingOfIsaacAntibirth

*** Because of how [[OneHitPointWonder The Lost]]'s health[[labelnote:*]]After every variation of his current or maximum health, that doesn't result in his death, he's immediately brought back to 0 heart container and 0,5 soul hearts, all other hearts being erased.[[/labelnote]] works, [[GameBreaker he can use Magic Skin with absolutely no limits to get every single item in the entire game]].

* DownTheDrain: Downpour, the beginning of the alternate route, is set in a flooded sewer section of the basement. It contains appropriate enemies such as bug-like water-sliders, as well as more original concepts like humanoids that are invisible aside from their reflections.

* EasterEgg: By fiddling with the "options_remix.ini" file,you can enable an announcer,similar to the one in Afterbirth,voiced by Leather-Ice-Cream,one of the mod's developers.

* GameBreakingBug
** There is a small chance that after beating [[spoiler:The Witness]],an item from the boss item pool will spawn instead of the endgame chest,rendering the run [[UnwinnableByMistake unwinnable]] .
** While holding the Red Key,quitting the run (By manually quitting,the game crashing,or so on),re-entering it, and using the Red Key will cause the game to crash.

* GuideDangIt: While the first three chapters of the Alternate Route are relatively easy to get to (requiring a key, two bombs, and two soul hearts to access, in that order; clearly given visual cue in the form of a lock, a boarded up door that gets cracked after one bomb, and a door with a gray heart in the middle), getting access to the final chapter, [[spoiler:Corpse]], is much, much more convoluted. [[spoiler:You have to bomb open an invisible chest on the second floor of Downpour to get one piece of a knife, solve a pressure-plate puzzle on the second floor of Mines to obtain a second piece, and put out fireplaces in a certain pattern on the second floor of Mausoleum to obtain the third and final piece. Once you have all three, defeat Mom in the Mausoleum and use the knife to open a fleshy door, leading you to Mom's Heart. Defeating Mom's Heart unlocks the Corpse chapter.]] Nowhere in the game is this hinted at, and to make things worse, [[spoiler:the fleshy door to Mom's Heart only appears ''after'' you get the knife]]! The only saving grace is that [[spoiler:you only have to solve each puzzle once, as unlocking each knife piece leaves it out in the open on all subsequent runs]].
* HailfirePeaks: The Mines has a strong emphasis on both [[LethalLavaLand fire]] and [[UndergroundLevel earth,]] with a minecart theme (as the name implies) and a little bit of BlackoutBasement.

** You can now go into negative health via Devil Rooms, and the mechanics are identical or near identical to the mechanics in the original game -- not ''Rebirth'', but the original Flash game. Furthermore, some ''Antibirth'' Devil Deals, such as the Quarter and Bloody Lust, were Devil Deals since at least ''Wrath of the Lamb'' that were removed in ''Rebirth''.

* PowerAtAPrice: Damocles generates an additional item for each item pedestal you come across. Even shops and Devil Rooms, with the extra items being free to take. The catch is that, starting from when you first take damage, Damocles can ''kill you at any time without warning'', so you better hope those items are enough to keep you from getting hit (or give you an extra life or two, as it can only kill you once). Fortunately, it's a single-use spacebar item that only applies its effects if used, so you can swap it out if you don't want to take the risk.

** A new Active Item is the [[VideoGame/NewSuperMarioBros the Mega Mush, which makes Isaac humongous for a limited time.]]

* SpiritualSuccessor: To ''[[https://www.youtube.com/watch?v=--xoKDvdTDY Community Remix]]'', a mod for the original flash game. Antibirth includes most of the features and items from ''Community Remix''.

[[AscendedFanfic On September 2018, it was announced that content from the game was going to be officially added into Repentance, the final expansion for The Binding of Issac Rebirth.]]

* DrugsAreBad: The Black Mushroom. It's an active item with a recharge time of a few seconds that increases tears and stacks with itself, so theoretically, you'd want to use it as much as possible... except each use also [[InterfaceScrew increasingly distorts your screen]]. You have to clear rooms to make the distortion clear up, but if you're relying on the Black Mushroom for damage, [[Catch22Dilemma you probably have to use it every room]]. If you ''really'' spam it to hell and back, it's entirely possible to render a run UnwinnableByInsanity due to the screen being distorted to the point of unplayability.

* DifficultySpike: The alternate chapters introduced by the mod are ''much'' harder than their counterparts in the base game.

* GuideDangIt: While the first three chapters of the Alternate Route are relatively easy to get to (requiring a key, two bombs, and two soul hearts to access, in that order), getting access to the final chapter, [[spoiler:Corpse]], is much, much more convoluted. [[spoiler:You have to bomb open an invisible chest on the second floor of Downpour to get one piece of a knife, solve a pressure-plate puzzle on the second floor of Mines to obtain a second piece, and put out fireplaces in a certain pattern on the second floor of Mausoleum to obtain the third and final piece. Once you have all three, defeat Mom in the Mausoleum and use the knife to open a fleshy door, leading you to Mom's Heart. Defeating Mom's Heart unlocks the Corpse chapter.]] Nowhere in the game is this hinted at, and to make things worse, [[spoiler:the fleshy door to Mom's Heart only appears ''after'' you get the knife]]! The only saving grace is that [[spoiler:you only have to solve each puzzle once, as unlocking each knife piece leaves it out in the open on all subsequent runs]].

''The Binding of Issac: Antibirth'' is a GameMod for ''VideoGame/TheBindingOfIsaacRebirth'' that was created by [[FunWithAcronyms Public Entertainment Networked Interactive Software]][[note]]A group formed by the ''Binding Of Isaac'' fans Kilburn, [=NotYourSagitarius=], [=LeatherIceCream=], and Mudeth[[/note]] and released on December 23, 2016. The mod acts as an alternate expansion for ''Isaac'' separate from ''Afterbirth'' and ''Afterbirth +'', and adds tons of new items, trinkets, bosses, enemies, and even two new characters and a new final chapter. While currently available to play, the developers consider this an "early-access" release, with more updates to come in the future.

* ClingyMacGuffin: The Magic Skin, a new item added to the game, is more or less this. If you swap it out for another item, it will ''always'' appear as the next item you find, unless you use it several times.
** It's also an example of SchmuckBait; using it will generate an item from the room's pool...[[PowerAtAPrice but every use will PERMANENTLY lock away one of your heart containers.]] The temptation for using it for free powerups is significant, and if you decide to ditch it, it'll just keep showing back up in place of normal items, not only depriving you of a normal item, but also ensuring that that temptation is always there...

* PowerAtAPrice: Damocles generates an additional item for each item pedestal you come across. Even shops and Devil Rooms, with the extra items being free to take. The catch is that it also has a chance of killing you instantly every time you take damage, so you better hope those items are enough to keep you from getting hit. Fortunately, it's a single-use spacebar item that only applies its effects if used, so you can swap it out if you don't want to take the risk.

* PowerUpLetdown: {{Subverted}} with the Rock Bottom item. When you get it, [[PoisonMushroom it lowers all of your stats]]... but prevents them from being lowered any further by other items or pills. When combined with items that raise one stat but lower another (like Soy Milk), this can be incredibly useful.

* EvilIsNotAToy: One of the new bosses, The Heretic ([[NonHumanUndead an undead The Haunt]]), plays out this trope during the battle against it. The battle starts with several enemies from the level summoning it in a ritual. The first thing The Heretic does? Transform them into {{Mooks}}, [[ThePawnsGoFirst which it then sends after you]].
* FireWaterJuxtaposition: The first two chapters of the Alternate Route, [[DownTheDrain Downpour]] and [[AbandonedMine The Mines]].

** The Siren doesn't summon allies, but instead sings a charming song that steals ''your'' familiars to use against you. Attacking the familiar returns it to your control.

** [[spoiler:The Witness resembles a zombified Mama Gurdy, which is fitting considering that it was inspired by an false rumor about a variant of Gurdy being a secret boss in ''Rebirth''.]]

** Voodoo Pin is a subversion; it hurts Isaac without damaging him, triggering any affects that occur when he takes damage normally.

** It's also an example of SchmuckBait; using it will generate an item from the room's pool...[[PowerAtAPrice but every use will PERMANENTLY lock away one of your heart containers.]] The temptation for using it for free powerups is significant, and if you decide to ditch it, it'll just keep showing back up in place of normal items, not only depriving you of a normal item but also ensuring that temptation is always there...

* EvilIsNotAToy: One of the new bosses, The Heretic ([[NonHumanUndead an undead The Haunt]]), plays out this trope during the battle against it. The battle starts with several enemies from the level summoning it in a ritual. The first thing The Heretic does? Transform them into {{Mooks}}, which it then sends after you.

** The Siren doesn't summon allies, but instead sings a charming song that steals ''your'' familiars to use against you. Attacking the familiar returns it you your control.
* GetBackHereBoss: Most of the challenge in Hornfel's fight comes from him popping in and out of the arena on his mine cart, which has many tracks and exit doors. Once you weaken him enough that his cart breaks, he tries to flee on foot, and killing him before he gets away makes him drop bomb pickup or bomb-related items.

** Great Gideon is a big Grimace, and it has traits of every Grimace variant, including being {{invincible|MinorMinion}} just like them and ceasing fire one every enemy in the room is dead.

** You can now go into negative health via Devil Rooms, and the mechanics are identical or near identical to the mechanics in the original game - not ''Rebirth'', but the original Flash game. Furthermore, some ''Antibirth'' Devil Deals, such as the Quarter and Bloody Lust, were Devil Deals since at least ''Wrath of the Lamb'' that were removed in ''Rebirth''.

* PowerUpLetdown: {{Subverted}} with the Rock Bottom item. When you get it, [[PoisonMushroom it lowers all of your stats]]... but prevents them from being lowered any further by other items or pills. When combined with items that raise one stat but lower the other (like Soy Milk), this can be incredibly useful.

** It's also an example of SchmuckBait; using it will duplicate a pedestal item tied to the current room, essentially allowing you to take a second Item/Shop/Devil/Angel room item for free...[[PowerAtAPrice but every use will PERMANENTLY lock away one of your heart containers.]] The temptation for using it for free powerups is significant, and if you decide to ditch it, it'll just keep showing back up in place of normal items, not only depriving you of a normal item but also ensuring that temptation is always there...
* DevelopersForesight: To unlock the final chapter of the alternate route, [[spoiler:Corpse]], you need to [[spoiler:find and assemble all three pieces of a knife hidden throughout the Alternate Route, then use it on the fleshy door that appears after defeating Mom in the Mausoleum]]; however, if you have [[spoiler:Mom's Knife]], you can use that instead of [[spoiler:the assembled knife to open the door]].

* EscortMission: One of the new items, Lost Soul, [[InvokedTrope invokes]] this. If it gets hit even once, it will disappear for the rest of the floor; however, if it survives the floor, it gives you a new item.

* TrickBoss: The battle against [[spoiler:Mom]] becomes this on the Alternate Route [[spoiler:once you get all 3 knife pieces]]. After defeating the boss [[spoiler:and using the knife to open up the sealed door in the boss arena, you have to fight a buffed Mom's Heart, with no chance to go back and gather more hearts]].

** [[TheMinionMaster Bethany]] starts off doing pathetic amounts of damage, and can't use soul hearts or their variants. However, her active item gives her a blue fire minion that shoots tears, and she can summon up to twelve at a time. Even better, her active item recharges every time she picks up a soul heart; this means she can quickly boost her damage output, at the cost of an active item and a wider hitbox (since the flames will be destroyed if they make contact with an enemy).

** The Eternal D6 works identically to the D6 in the ''Eternal Update''. It's even called "Florian's Dice" in the files, as Florian Himsl was the one behind the Eternal Update.

* MechanicallyUnusualFighter: Both of the two new characters, Bethany and Jacob/Esau.
** [[MinionMaster Bethany]] starts off doing pathetic amounts of damage, and can't use soul hearts or their variants. However, her active item gives her a blue fire minion that shoots tears, and she can summon up to twelve at a time. Even better, her active item recharges every time she picks up a soul heart; this means she can quickly boost her damage output, at the cost of an active item and a wider hitbox (since the flames will be destroyed if they make contact with an enemy).
** [[MesACrowd Jacob and Esau]] are both played at the same time, with Jacob having more health but Esau doing far more damage. They pick up items separately, and if one of them dies, the other dies instantly.

''The Binding of Issac: Antibirth'' is a GameMod for ''VideoGame/TheBindingOfIsaacRebirth'' that was created by [[FunWithAcronyms Public Entertainment Networked Interactive Software]][[note]]A group formed by the ''Binding Of Isaac'' fans Kilburn, [=NotYourSagitarius=], [=LeatherIceCream=], and Mudeth[[/note]] and released on December 23, 2016. The mod acts as an alternate expansion for ''Isaac'' separate from ''Afterbirth'' and Afterbirth +'', and adds tons of new items, trinkets, bosses, enemies, and even two new characters and a new final chapter. While currently available to play, the developers consider this an "early-access" release, with more updates to come in the future.

* AscendedFanon: Some of the items from the mod- such as 120 Volt, Bird's Eye, and Mucormycosis- got added to the official game in the ''Afterbirth +'' expansion, albeit in a slightly [[{{Nerf}} nerfed]] form.
** Within the mod itself, [[spoiler:the Ur-Gurdy, a fictitious boss that spawned an UrbanLegendOfZelda in ''Rebirth'', is added as "The Witness", the TrueFinalBoss of the Alternate Route.]]

''The Binding of Issac: Antibirth'' is a GameMod for ''VideoGame/TheBindingOfIsaacRebirth'' that was created by [[FunWithAcronyms Public Entertainment Networked Interactive Software]][[note]]A group formed by the ''Binding Of Isaac'' fans Kilburn, NotYourSagitarius, LeatherIceCream, and Mudeth[[/note]] and released on December 23, 2016. The mod acts as an alternate expansion for ''Isaac'' separate from ''Afterbirth'' and Afterbirth +'', and adds tons of new items, trinkets, bosses, enemies, and even two new characters and a new final chapter. While currently available to play, the developers consider this an "early-access" release, with more updates to come in the future.