Burning Basement

The Burning Basement is one of the environments in chapter 1 added in The Binding of Isaac: Afterbirth. The theme of the Burning Basement is fire, and most enemies are replaced with burning versions. There are relatively few flying or shooting enemies; most of the enemies are ground-based and rely on contact damage. Rocks have a chance to be replaced with Fire Places.

The Burning Basement's alternate floors are and.

The Burning Basement is unlocked by defeating Mom's Heart 11 times.

After is unlocked, a locked door similar to the one leading to a Treasure Room will appear in this floor's Boss Room upon defeating the boss leading to  /. Like a Treasure Room, this door requires a key to be unlocked. Unlike Angel Rooms and Devil Rooms, this door never disappears.

Monsters

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Trivia

 * Despite being called the Burning Basement, the backdrop of the floor is actually based on The Cellar.

Music
The track that plays in the Burning Basement is titled Fundamentum.

Binding of Isaac: Afterbirth OST