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DOSDOS · 1992 · Dungeon crawler RPG

Ultima Underworld

Ultima Underworld (DOS, 1992) has an open-source reimplementation, hankmorgan/UnderworldExporter, and 6 other public projects, including a matching decompilation and a decompilation.

Data checked 2026-10-12 · unbaked registry

Projects

UnderworldExporterarchived
ReimplementationUnity340 starspushed 2024-02-14MIT licenserelease V1.09

Updated Release 27th Oct 2018 Unity based port of Ultima Underworld I and II. Download under releases

development halted; status playable; Superseded by UnderworldGodot

UnderworldGodot
ReimplementationGodot C#328 starspushed 2026-09-30MIT license

Engine recreation for Ultima Underworld and Ultima Underworld 2 using the Godot Engine

Active engine recreation

Underworld Adventures
ReimplementationC++75 starspushed 2026-07-30GPL-2.0 licenserelease version-0.10.0-pina-col…

Underworld Adventures is a project to recreate Ultima Underworld 1 on modern operating systems, using the original game files.

Semi-playable

underworld-exhumed
Matching decomp · Static recompBorland C++ 1990, Exhume47 starspushed 2026-10-10MIT licenserelease uw1-v1.0.1

Underworld Exhumed: Ultima Underworld I and II as byte-matching source code and native ports for macOS, Windows and Linux

Byte-matching source of UW1 and UW2 (Borland 1990 tools) + native macOS/Windows/Linux ports replaying recorded DOS sessions with identical state (2026)

OpenUnderground
Reimplementation27 starspushed 2026-10-12no licenserelease UUBuild29Sep2026b

latest release UUBuild29Sep2026b (2026-10-06)

Underworld Revisited
Source port14 starspushed 2026-10-11MIT licenserelease v0.7.0

An open-source reimplementation of Ultima Underworld: The Stygian Abyss (1992) in Unity, faithful to the original's rules. Fully playable. Needs the GOG version; no game data included.

dropped from awesome-decomp-games: awesome-game-remakes-only, <

uw1-pocketpc-decompnew, unvetted
DecompC (from Pocket PC port)1 starspushed 2026-10-12no license

An Ultima Underworld 1 decompilation project based on the Pocket PC port

Decompilation based on the Pocket PC port (2026).

What you need

You need your own copy of the game: these projects ship code only.

More on DOS

GameMethodYearStarsLast push
DOSDoomSource releaseMatching decomp+8199320k2026-10-12DOSChex QuestSource release199620k2024-05-24DOSCommand & Conquer: Red AlertSource releaseReimplementation+3199618k2026-10-11DOSCommand & ConquerSource releaseReimplementation+2199518k2026-10-12DOSTransport Tycoon DeluxeReimplementationDisassembly+119958.4k2026-10-12DOSQuakeSource releaseMatching decomp+419966.1k2026-10-12DOSSimCity 2000Static recompReimplementation+119935.3k2026-10-11DOSHereticSource releaseReimplementation+119943.1k2026-10-12

Found via osgameclones.com/, hankmorgan/UnderworldExporter, abedegno/Exhume, SubmitGame/awesome-decomp-games, radek-sprta/awesome-game-remakes

GitHub data checked 2026-10-12. Notes are summaries from the research pass; the project pages are the authority.