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DOSDOS · 1994 · turn-based tactics / strategy

X-COM: UFO Defense

X-COM: UFO Defense (DOS, 1994) has an open-source reimplementation, OpenXcom/OpenXcom, and 4 other public projects, including a static recompilation. An agent environment already wraps it.

Data checked 2026-10-13 · unbaked registry

Projects

OpenXcom
ReimplementationC++ / SDL2,230 starspushed 2026-09-28GPL-3.0 license

Open-source clone of the original X-Com 👽

Mature reimplementation.

emupedia-game-xcom-emscripten
Reimplementationopen-source X-Com clone compiled with Emscripten (Emupedia fork/mirro…0 starspushed 2015-12-22GPL-3.0 license

Open-source clone of the original X-Com

Hosted/mirrored by Emupedia (emupedia.net retro-OS web hub); mostly forks of upstream projects, many unmaintained since 2019-2022

UFO2000
ReimplementationC++

development halted; status playable

SR (M-HT) – X-Comcovers 5 games
Static recompSR + llasm425 starspushed 2026-08-27no licenserelease septerra_v1.04.0.13

A project to statically recompile following games to create Windows or Linux (x86 or arm) versions of the games - Albion, X-Com: UFO Defense (UFO: Enemy Unknown), X-Com: Terror from the Deep, Warcraf…

Supported DOS targets of SR

VideoGameBench (dev set)covers 20 games
Agent environmentJS-DOS (browser) via Playwright375 starspushed 2025-05-30custom license

Benchmark environment for evaluating vision-language models (VLMs) on popular video games!

Included in VideoGameBench dev split (2025)

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What you need

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

Agent environments

More on DOS

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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 emupedia.net/, osgameclones.com/

GitHub data checked 2026-10-13. Notes are summaries from the research pass; the project pages are the authority.