Heretic
Heretic (DOS, 1994) has a source port, chocolate-doom/chocolate-doom, and 1 other public project, including an official source code release.
Data checked 2026-10-12 · unbaked registry
Projects
Source portC, SDL22,430 starspushed 2026-10-12GPL-2.0 licenserelease chocolate-doom-3.1.1
Chocolate Doom is a Doom source port that is minimalist and historically accurate.
Community source port of officially released code.
Source releaseC/asm51 starspushed 2015-11-21no license
Heretic (1994) by Raven Software
Officially released source, mirrored by videogamepreservation/historicalsource. (repo archived)
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+119935.3k2026-10-11DOSThe Elder Scrolls II: DaggerfallMatching decompReimplementation+119963.5k2026-10-07Found via en.wikipedia.org/wiki/List_of_commercial_video_g, historicalsource/heretic
GitHub data checked 2026-10-12. Notes are summaries from the research pass; the project pages are the authority.