Boss Room

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Bossroom.png

Boss Rooms contain one of the many Bosses, with victory granting Isaac an item from the Boss Pool, Hearts (depending on difficulty), and a trap door leading to the next level.

Notes[edit | edit source]

  • Double Trouble boss rooms contain 2 bosses of the same type from the previous chapter. Defeating them only gives one item. Double Trouble boss rooms only appear from Chapter 2 onward.
    • DLC Indicator.png Double Trouble boss rooms can now contain 2 bosses of different types. Additionally, they can appear as early as Chapter 1.
  • If the floor is affected by Curse of the Labyrinth, 2 separate boss rooms will appear in series. The trapdoor to the next floor will only appear after defeating the second boss.
  • When a boss is defeated, an entrance to a Devil Room or Angel Room can appear.
    • It is impossible for a Devil Room door to appear on the first floor, unless a Joker card is used. A Devil Room door can also appear in a boss room on the first floor if the floor is spawned with the Curse of the Labyrinth, in which the Devil Room door will appear after defeating the second boss.
    • Upon defeating Mom's Heart, a Devil Room containing a trapdoor or an angel room containing a beam of light may appear. This allows Isaac to visit Sheol or Cathedral respectively even if It Lives has not yet been unlocked. If one of these paths are taken instead of touching the large chest, the next Mom's Heart ending will not play, but will be unlocked and it will count as a victory against Mom's Heart.
      • DLC Indicator.png Devil Rooms and Angel Rooms no longer contain a trapdoor or a beam. They instead have their normal contents.
  • Mr. Fred and Mega Satan are always fought in a double-sized room.
    • DLC Indicator.png Hush is always fought in a 2x2 room and Ultra Greed is fought in a double-sized one (2x1).
    • Afterbirth† Indicator.png Delirium is fought in a 2x2 room.

SmallIsaac.png Rooms SmallIsaac.png

Boss Room Icon.png
Boss Room
Mini-Boss Room Icon.png
Mini-Boss Room
Treasure Room Icon.png
Treasure Room
Shop Icon.png
Shop
Arcade Icon.png
Arcade
Challenge Room Icon.png
Challenge Room
Boss Challenge Room Icon.png
Boss Challenge Room
Curse Room Icon.png
Curse Room
Sacrifice Room Icon.png
Sacrifice Room
Secret Room Icon.png
Secret Room
Super Secret Room Icon.png
Super Secret Room
Library Icon.png
Library
Devil Room Icon.png
Devil Room
Angel Room Icon.png
Angel Room
Vault Icon.png
Vault
Dice Room Icon.png
Dice Room
Bedroom Icon.png Bedroom2 Icon.png
Bedroom
Super Secret Room Icon.png
I AM ERROR
Super Secret Room Icon.png
Boss Rush
Super Secret Room Icon.png
Crawl Space
Super Secret Room Icon.png
Black Market