0 A.D.
0 A.D. (PC, 2010) has an official source code release, 0 A.D.. An agent environment already wraps it.
Data checked 2026-10-12 · unbaked registry
Projects
Source releaseC++/JS
Open-source historical RTS; built-in RL interface (rl-interface, Python zero_ad client) since A24
What you need
Free game data is included with at least one project.
Agent environments
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 releaseReimplementation201011k2026-10-12Found via 0ad/0ad
GitHub data checked 2026-10-12. Notes are summaries from the research pass; the project pages are the authority.