Garry's Mod
Garry's Mod (PC, 2006) has code that decompiles almost back to source, Facepunch/garrysmod.
Data checked 2026-10-12 · unbaked registry
Projects
Readable bytecodeSource engine + Lua; dedicated server1,316 starspushed 2026-09-16no licenserelease 2026.09.16
Sandbox mod for the Source Engine
GitHub
What you need
You need your own copy of the game: these projects ship code only.
More on PC
GameMethodYearStarsLast push
PCMindustrySource releaseAgent environment201929k2026-10-11PCosu!Source releaseReadable bytecode+1200719k2026-10-12PCCommand & Conquer Remastered CollectionSource release202021k2025-01-16PCRollerCoaster Tycoon 2ReimplementationAgent environment200216k2026-10-12PCDune 2000Reimplementation199818k2026-10-11PCAge of Empires IIReimplementation199914k2026-10-03PCCataclysm: Dark Days AheadSource release201313k2026-10-12PCCivilization VSource releaseReimplementation201011k2026-10-12GitHub data checked 2026-10-12. Notes are summaries from the research pass; the project pages are the authority.