Themed room

The following information pertains to an upcoming version (NetHack 3.7). If this version is now released, please verify that it is still accurate, then update the page to incorporate this information.

Themed rooms are rare rooms that are unlike normal rectangular rooms. There is a 33 in 1033 chance (approximately 1 in 31) that the game will attempt to place a themed room instead of a normal random room. Some themed rooms are simply unusual shapes, while others have contents unlike those that appear anywhere else. Some themed rooms can be further transformed into special rooms.

List of themed rooms

Name	Can be special	Map	Notes
Normal random room	Yes		A common rectangular room.
Fake Delphi	Yes		A 11×9 room with a 3×3 room in its center, imitating Delphi.
Room in a room	Yes		A random room with a random subroom
Huge room	Yes		A very large room, with a 90% chance of containing a subroom.
Ice room	No		The floor is covered with ice.
Boulder room	No		The room contains d6+3 boulders and d4 rolling boulder traps. It does not get normal room contents.
Spider nest	No		The room contains 3d3 webs, each with a giant spider sitting on it. It does not get normal room contents.
Trap room	No		Each floor space in the room has a 75% chance to have a trap. All of these traps will be of the same type, and they may have corpses and possessions on an eligible level. They can be arrow traps, dart traps, falling rock traps, bear traps, land mines, sleeping gas traps, rust traps or anti-magic fields. It does not get normal room contents.
Buried treasure	Yes		There is a chest buried in the floor, containing 3d4 random objects.
Massacre	No		There are 5d5 player monster or quest guardian corpses on the floor. It does not get normal room contents.
Statuary	No		There are 5d5 statues and d3 statue traps. It does not get normal room contents.
Light source	No		The room is always dark, containing a lit oil lamp. It does not get normal room contents.
Temple of the gods	No		There is an altar of each alignment. The room is not an actual temple and does not contain a priest. It does not get normal room contents.
Mausoleum	No	------- |.....| |.---.| |.|.|.| |.---.| |.....| -------	There is a 50% chance that there will be a lich, mummy, vampire or zombie sealed in the centre of the room; otherwise there will be an @ corpse. There is a 20% chance that the centre will have a secret door; beware. It does not get normal room contents.
Random dungeon feature	No		At the centre of the room is a cloud, lava, ice, water or a tree.
L-shaped	Yes	-----    |...|    |...|    |...---- |......| |......| |......| --------	There are four rotations of this type of room.
Blocked center	Yes		A 9×9 room with the central 3×3 spaces filled with walls, water or lava.
Circular, small	Yes	---    --.--  --...-- |.....| --...--  --.--    ---
Circular, medium	Yes	-----    --...--  --.....-- |.......| |.......| |.......| --.....--  --...--    -----
Circular, big	Yes	-----     ---...---   -.......-  --.......-- |.........| |.........| |.........| --.......--  -.......-   ---...---     -----
T-shaped	Yes	-----       |...|       |...|    ---|...---- |.........| |.........| |.........| -----------	There are four rotations of this type of room.
S-shaped	Yes	--------    |......|    |......| ----......| |......---- |......| |......| --------	There are four rotations and reflections of this type of room.
Cross	Yes	-----       |...|       |...|    ----...---- |.........| |.........| |.........| ----...----    |...|       |...|       -----
Four-leaf clover	Yes	----- ----- |...| |...| |...---...| |.........| ---.....---   |.....|   ---.....--- |.........| |...---...| |...| |...| ----- -----
Water-surrounded vault	No	}}}}}} }----} }|((|} }|((|} }----} }}}}}}	The room is not connected to the other rooms, but may appear adjacent to a corridor. It can generate alongside an actual vault. It contains a giant zombie, ettin zombie or vampire lord guarding four chests. It does not get normal room contents.