Binding of Isaac Rebirth: Boss Room

A Boss Room (Gemini) in the Binding of Isaac: Rebirth (BOIR)

Isaac VS Gemini. This screen is a good indicator that you have entered a Boss Room.

The Boss Room is a type of Room in The Binding of Isaac: Rebirth (TBOIR)

In this room, you will fight the Boss of the level

You need to defeat the Boss before you can proceed to the next floor.

Trivia

• Boss rooms often contain blood, rocks, or Poop