Once all three knife pieces have been acquired, upon completing Mausoleum II , a red fleshy door will appear. On subsequent runs, this door will appear regardless of whether or not you have all three knife pieces. Stabbing the door with the knife or Mom's Knife will open it, leading to a more difficult variant of Mom's Heart. After defeating Mom's Heart, the trapdoor previously leading to the Womb will now lead to the Corpse.
Isaac Cheat Sheet
The Binding of Isaac: Antibirth - Modding of Isaac
Just when you thought it was safe to go back in the basement, another expansion for The Binding Of Isaac: Rebirth has been announced. First released in , Antibirth adds so many new characters and floors and enemies and things that work in different and surprising ways, and feels mighty polished too. As someone still playing Isaac every day, I'm always up for more. McMillen added that Antibirth team member "LeatherIceCream" is involved too, and that Isaac: Repentance will also include new music, new cutscenes, and story bits. Yes , it will cost money and no, they haven't settled a release date yet. I am excited to have more Isaac, heck yeah, and will be glad to see the Antibirth team's work get more attention. Antibirth is remarkable, feeling almost like a different game as it dances across new alternate floors and boss battles that can play quite differently to Isaac.
The Binding Of Isaac adding Antibirth mod in next expansion
Antibirth is an unofficial, fan-made expansion for Rebirth. For more info see antibirth. After taking two hits, the fire will be extinguished.
Five Ten years ago, a young boy took his first trip down into the basement, facing the endless threats below to escape from the murderous delusions of his loving mother. Three years later, he found himself facing the same predicament but with an even greater plague of horrors and peril. Very shortly afterward, a modest few among us decided that even this was not enough. In the two years since then, fate has worked tirelessly to place by far the most fearsome challenge yet in his path. So what exactly is in store for him?