Heretic II

Heretic II (PC, 1998) has an open-source reimplementation, m-x-d/Heretic2R, and 2 other public projects, including an official source code release.

Data checked 2026-10-12 · unbaked registry

Projects

Heretic2R

ReimplementationC (Quake II engine based; reverse-engineered game code)267 starspushed 2026-08-21GPL-3.0 licenserelease R6

Heretic II (1998, Raven Software) reverse-engineered source port.

Very active (2026); playable ()

heretic2

Source release31 starspushed 2026-10-11custom licenserelease 8.71H15

Heretic2 playground sandbox. Can contain non GPL code. Be careful!!!!

latest release 8.71H15 (2026-07-28)

Heretic II

Source releaseC (Quake II engine)

Wikipedia: source-available (non-OSI license and/or partial SDK code); source released 1998 by/for Raven Software. Game code distributed with the official editing tools.

What you need

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

More on PC

GameMethodYearStarsLast push

PCMindustrySource releaseAgent environment201929k2026-10-11 PCosu!Source releaseReadable bytecode+1200719k2026-10-12 PCCommand & Conquer Remastered CollectionSource release202021k2025-01-16 PCRollerCoaster Tycoon 2ReimplementationAgent environment200216k2026-10-12 PCDune 2000Reimplementation199818k2026-10-11 PCAge of Empires IIReimplementation199914k2026-10-03 PCCataclysm: Dark Days AheadSource release201313k2026-10-12 PCCivilization VSource releaseReimplementation201011k2026-10-12

Found via osgameclones.com/, radek-sprta/awesome-game-remakes, SubmitGame/awesome-decomp-games, en.wikipedia.org/wiki/List_of_commercial_video_g, gamingonlinux.com/2026/03/heretic-ii-has-a-new-r

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