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IsaacHD Xxx form2 Isaac Rebirth Keeper sprite The dungeon structure is randomly generated. However, there are some rules when it comes to the generation of a new Floor.

Rooms in the Basic Game[]

Common Room[]


The default type of room has no special symbol on the map, and this type of room makes up the majority of the map. They can have up to four adjacent rooms, which can have any type. Most of them will contain monsters 'indigenous' to the current chapter. Upon clearing such a room, a player might be rewarded with a random pickup or chest that will spawn in the center of the room (unless there's an obstacle like a stone, in which case it will spawn at the nearest free space to the top left).

Aside from the generic monster rooms, there are also some notable types that are still somewhat different: They are mostly void of monsters, and for example present an object like a chest, or a game of chance in the center. As with every common room, it is possible for them to exist multiple times on the same level, since technically speaking they are no special kind of room.


Rooms that will always appear:

 

Icon

Name

Rooms that are always present in the first 3 chapters

Treasure room icon

Treasure Room

Shop icon

Shop
Secret room icon Secret Room
BossRoomIcon Boss Room

Rooms of that type added in Wrath of the Lamb

Curse room icon

Curse Room

Sacrifice room icon Sacrifice Room
Super secret room icon Super Secret Room

Challegne room icon

Challenge Room (may appear in Sheol)

Arcade icon

Arcade

Mini-boss room

(may appear in Sheol) Mini-Boss Room
Rooms that may occasionally appear

Rooms of that category added in Wrath of the Lamb

Boss challenge room

Boss Challenge Room

Libary icon

Library

Rooms that need special conditions to be met to appear
Super secret room icon Error Room

Super secret room icon

Devil Room

Rooms of that type added in Wrath of the Lamb

Angel room icon

Angel Room

Rooms of that type added in the Eternal edition
Eternal Challenge Room
Rooms
Unlocked Rooms
BossRoomIcon
Boss Room

Curse room icon
Curse Room
Wrath of the Lamb DLC

Sacrifice room icon
Sacrifice Room
Wrath of the Lamb DLC
Super secret room icon
Devil Room

Angel room icon
Angel Room
Wrath of the Lamb DLC
Locked Rooms

Treasure room icon
Treasure
Room
Shop icon
Shop
Arcade icon
Arcade

Libary icon
Library
Wrath of the Lamb DLC
Hidden Rooms
Secret room icon
Secret Room

Super secret room icon
Super Secret Room
Wrath of the Lamb DLC

Super secret room icon
I AM ERROR
Wrath of the Lamb DLC
Barred Rooms
Challegne room icon
Challenge Room


Boss challenge room
Boss Challenge
Room

Wrath of the Lamb DLC
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