Secret Room

Description

The following room maps were made using Basement Renovatorhttps://github.com/Tempus/Basement-Renovator for cleaner viewing; note that all Urns you see will be Mushrooms when encountered in-game.

Variations

The following room maps were made using Basement Renovatorhttps://github.com/Tempus/Basement-Renovator for cleaner viewing; note that all Urns you see will be Mushrooms when encountered in-game.

Possible Layouts

Starting from the first floor of Chapter 3 onward, Greed and Super Greed have a chance to replace Secret Rooms.

Alternate Variations

Secret Rooms in alternate chapters (Downpour, Dross, Mines, Ashpit, Mausoleum, Gehenna and Corpse) differ from the standard layouts. Each alternate floor has 11 unique layouts (12 in Downpour). Regular Secret Room layouts cannot appear on these floors.

Super Secret Rooms

Super Secret Rooms are most likely to be found either at the end of a series of rooms that lead to a dead-end, and are particularly likely to appear near the Boss Room, as they are the second room type to be placed on a map during Map Generation, and are therefore placed far away from the room Isaac starts in. Because Shops are the third type of room generated, super secret rooms are also likely to spawn near the shop, and are likely to spawn in between the shop and the Boss Room.

a Greed Mode Layouts

Greed Mode has its own set of Super Secret Room layouts.

Ultra Secret Rooms

Ultra Secret rooms are most likely generated in spots that connect to 3+ non-red rooms through its adjacent red rooms (different squares in L rooms count as 2). They can be connected to 2 or 1 non-red rooms through its adjacent red rooms, but a specific 3+ room location is 11.5x more likely than a specific 2 room location, and 1 room locations being virtually impossible if there is a 3+ location available. If there is no 3+ room location available then a specific 2 room location is 11.5x more likely than a specific 1 room location. Ultra Secret Rooms can't be connected to red rooms that connect to Secret Rooms, Super Secret Rooms, or Curse Rooms, and can't be in a location where any of its adjacent red rooms are invalid, such as next to a Boss Room (Boss Rooms in The Void can have red rooms next to them, but the Ultra Secret Room will never be connected to one), next to the sides of narrow rooms, or any room that can't have a red room opened on that specific side, however locations on the 13x13 border where a red room would normally open to an I AM ERROR room are allowed.

Notes

* Generally, the best strategy for finding Ultra Secret Rooms is by checking a location that connects to at least 3 non-red rooms through its adjacent red rooms (in which all sides can have red rooms created, and isn't next to a Secret, Super Secret, or Curse Room), and if it's not in any 3+ locations, checking the spots connected to 2 rooms, then 1. ** When choosing which side to open from, the best way to increase your odds is to open the red room that connects to the highest number of other potential Ultra Secret Room locations. *** However, there is also value in choosing to open a red room that connects to an otherwise hard-to-access room, such as a Boss Challenge Room. ** If the only remaining valid locations are connected to a single non-red room, it's just as likely for the Ultra Secret Room to be connected to the side of a single room as it is connected to a corner.

Notes

* Secret Rooms are found by bombing the middle of a wall in a standard size room. For larger size rooms, divide the room mentally into the size of individual rooms to figure out where to bomb. * One easy strategy to place the bomb correctly in large rooms is to position Isaac in a corner, walk along a wall, then place the bomb at the spot where the camera starts moving. * For closet-size rooms, Secret Rooms will never be found by bombing the sides but may be found by bombing the wall at the end of the closet. * Rooms adjacent to Secret Rooms will always have a clear, walkable path to the middle of the wall where Isaac can place a bomb. Secret Room entrances are never found in front of gaps, obstacles, spikes, or places that enemies spawned when the room was originally entered. Each room adjacent to a Secret Room must satisfy these requirements, so if one room near a suspicious gap in the map fails these requirements, then look elsewhere.

Images