Principia

Open-source physics sandbox game with circuitry, mechanics, robots, puzzles and Lua scripting

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Principia is an open-source sandbox game where players build physics-based contraptions using mechanics, electronic circuitry, robots and Lua scripting, with puzzles alongside free-form building. Originally released in 2013 and open-sourced in 2022, it runs on Windows, Linux and Android with community-maintained builds and an active wiki and forum. It suits players who enjoy tinkering with machines and simple programming.

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