Principia

Principia (PC, 2013) has an official source code release, Bithack/principia.

Data checked 2026-10-12 · unbaked registry

Projects

Source releaseC++423 starspushed 2026-09-23custom licenserelease 2026.09.19

Open source physics-based sandbox game with electronic circuitry, mechanics, robots, puzzles, Lua scripting and more.

Wikipedia: open engine AND open game data; source released 2022 by/for Bithack AB. Principia was announced to be made open source in 2016, but the source code was not released until 2022. Development of the game has since then been continu…

What you need

Free game data is included with at least one project.

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Found via en.wikipedia.org/wiki/List_of_commercial_video_g, x.com/bithack/status/719403572115423232, x.com/bithack/status/1555904122313908224

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