Rooms

Description

Each floor of the game is made up of a number of Rooms. The number of Rooms on each floor generally increases as the game progresses.

Normal Rooms

Normal Rooms make up the majority of the Rooms on a floor. These Rooms typically contain enemies and may drop a pickup or chest after all enemies are killed. Many Rooms also contain various pickups, chests, items, and obstacles. Isaac cannot leave a Room with enemies until they are all killed or until a door is opened with an explosion. If Isaac is currently holding an active item, completing a Room with enemies will add one charge. Rooms can come in various sizes; while normal-sized Rooms are the most common, double and quadruple-sized Rooms can also appear. * The last wave of Boss Rush adds only one charge. Sometimes rooms can be "flooded" with water, blood, or lava, depending on the Chapter. Flooded rooms allow for unique interactions with some Items, such as Jacob's Ladder, and enemies.

a Closets

Closets are rare, small, dead end Normal Rooms. They will often contain a unique arrangement of items, objects, or pickups.

Boss Rooms

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. It always spawns in the room that's as far from the starting room as possible.

Mini-Boss Room

Mini-Boss Rooms are identical in appearance to normal Rooms and contain one of the Seven Deadly Sins. * Mini-Boss Rooms are iron barred shut upon entering and are unable to be escaped and opened, even by explosions, until the Mini-Boss is defeated. * Mini-Boss Rooms have a map icon but don't have a special door. ** The map icon is only revealed once the room is entered, or if Isaac has an item that reveals map icons like The Compass.

Normal/Golden Treasure Rooms

A Treasure Room, or Item Room, is guaranteed to appear on all floors from Basement 1 to Depths 2. From Basement 2 and on, this Room requires a key to enter. The Room contains one item from the Treasure Room item pool. Various obstacles may be present, and occasionally Fly|a|display=Flies or Greed Gaper|a+nrs/Bulb|rs will be present. This Room has a small chance to contain two items from the treasure pool that can both be collected, and a very small chance of containing no item pedestal at all, instead containing one poop pile, 3 Attack Fly|display=Attack Flies, and various pickups, including one trinket. * a+ Golden Treasure Rooms appear in Greedier mode as well, acting the same way and requiring a key to open.

a Silver Treasure Rooms

Silver Treasure Rooms are Rooms found in Greed Mode. They always contain one item from the Greed "Boss" Item Pool, and require no keys to open, being open from the start of the floor.

r Devil Treasure Rooms

When carrying the trinket, any newly found or not walked into Treasure Room becomes a Red Treasure Room, which contain items from the Devil Room pool for the price of heart containers. The prices are the same as normally required in regular Devil Deals.

r Planetariums

Planetariums are similar to Treasure Rooms, but only contain one powerful celestial item belonging to the Planetarium (Item Pool), items exclusive to Planetarium Rooms. Planetariums have an additive and higher chance of spawning if the player avoids walking into Treasure Rooms.

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