Open-source game-engine software

901 open-source libraries, tools and applications tagged game-engine, ranked by how closely game-engine is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.

901 products, primary matches first, then adoption-weighted; health v2 shown.

Product	Health v2	Stars	Maturity
openai/neural-mmo Neural MMO is a massively multiagent game environment (MMORPG-style) for training and evaluating intelligent agents, released alongside an …	10	1652	abandoned