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Characters
Levels
Items
Bosses
Secrets
100
This Character is missing an eye.
What is Cain?
100
On the second floor of this level, you fight Mom.
What is The Depths/Necropolis?
100
This items description is "Blood laser barrage."
What is Brimstone?
100
This boss i invulnerable until you kill his three minions.
What is The Haunt?
100
This(these) give you the ability to move on after beating Sheol/The Cathedral.
What is the polaroid and/or the negative?
200
This character starts with a bird, and is terribly cursed.
What is Eve?
200
A good part of these floors' enemies are red.
What is The Womb/Utero?
200
This book is unlocked after defeating all of the seven deadly sins.
What is The book of Sin?
200
A boss fought in the Womb that has a vulnerable tail and is similar to an earlier boss.
What is Scolex?
200
This room is only accesible through teleportation.
What is the I AM ERROR-room?
300
This character get stronger and stronger, even if he does not get any new items.
What is Samson?
300
This floor is an alternate to the Basement, and features many spiders.
What is The Cellar?
300
This item gives you +1 to every stat and then shuffles them.
What is Experimental Treatment?
300
This boss is an alternate to Monstro, only he has the ability to slow you.
What is Gish?
300
These rooms are one every floor and contain something different each time. They also require a bomb to enter.
What is Secret rooms?
400
This character starts with The D6 after unlocking it.
What is Isaac.
400
These floors both have giant locked door in the room you start in.
What is The Chest/The Dark room?
400
This item is a reference to a Glitch found in Pokémon.
What is Missing No.
400
A boss you do not need to fight. You choose to fight it, and the reward is not a regular item.
What is the Angel?
400
Collecting these gives you the ability to fight the secret boss located behind the giant golden door in the Chest.
What is Key pieces?
500
This character does not have a gender, hir is something else every time.
What is Eden?
500
This floors' boss has horns no matter what,
What is The Dark room?
500
This item was the first teased new item on bindingofisaac.com
What is The Champion belt
500
This boss can be fought on any floor.
What is The Fallen/headless horseman? (its enough to name one of the two.)
500
This character cannot gain life in any form.
What is The Lost.