Welcome to Principia
Principia is a physics-based sandbox game. Build and play advanced contraptions, circuiting, minigames, robot adventures and more. Open source, free and available for Windows, Linux, Android and more, download it today.
This site is the new community site for Principia. When you have installed Principia, enjoy the levels others have created, and register in order to upload your own levels and interact with the community.
Also check out...
And the Official community site archive, an archive of old levels spanning from 2013 to 2018.
Featured levels
Latest news More
- Aug 1, 2024 – New contest: Destruction Frenzy
- Jul 12, 2024 – Principia 2024.07.12
- Jun 28, 2024 – Principia 2024.06.28
- May 18, 2024 – Principia is now on F-Droid!
- Feb 29, 2024 – Principia 2024.02.29
SupersarK commented on Tank Suspension Track V2 (Prototype): 2 days ago
Anyway, you can fill that tank heavy cuz that has 2 motor with itAnchovy commented on What the heck did I make?: 13 days ago
It reminds me of a car engine piston.Galaxium commented on DFT: 17 days ago
DFT:Don't Forget Thee
Galaxium commented on Hello everyone!: 24 days ago
Hallo :DLuna commented on Hello everyone!: 27 days ago
thank youROllerozxa commented on Hello everyone!: 28 days ago
Welcome back!Galaxium commented on Velocity is wrong: 1 month ago
Great, you broke it ;DMEMORY_LOST commented on walker but better: 1 month ago
this walker looks like it just started walking from it mother's womb lol