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- 26th May 2026 - xNetHack version 10.0 is released. See this reddit post for details.
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A bones level is a level that is saved when you die, which may be reloaded into some future game. Such levels are also known as bones files or simply bones.
The game will store no more than one bones file per dungeon level. When a player enters a level for the first time and a bones file exists for that level, it will only be loaded as a bones level 1/3 of the time; otherwise it will generate the usual level and the bones file will remain untouched.
If a second adventurer is killed in a bones level, the level may then again be saved as bones, creating a double bones, or rarely even a triple or quadruple bones.
Bones levels can be very beneficial to find, since they will contain a bones pile where the dead adventurer has dropped all their possessions, but they can also be dangerous, since whatever killed the adventurer is likely still lurking around somewhere.