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Download it from itch.io: UUBuild2Nov2026.zip
It runs on Windows, and on Linux or a Steam Deck through Proton. You need the original game's data files: the game.gog file of a GoG copy, or the CRIT, CUTS, DATA and SOUND folders of an installed original copy. GoG is the version it is tested with; the original DOS version should work too.
This build brings the creatures closer to the original: they hear and see you as in the original, so you can sneak up on them, and they flee, call their kin and come back with time. The map fills in with what your light shows, the magic panel lists the spells you know, runes can be typed and the rune shelf stays on screen, you can sleep anywhere, and a new Setup screen lets you choose the music, your own MP3, OGG or WAV files too. Character creation, experience, lava, resistances and many spells now work as in the original, with many bug fixes.
Every change is listed in the CHANGELOG.