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
G-flow commented on Large Dummy: 11 hours ago
it looks goodGlados commented on Need lua help for spinning this wheel: 7 days ago
Just apply torque to the entity and doneGalaxium commented on Big Robot Prototype: 17 days ago
More full featured than what I made ;)Galaxium commented on Large Dummy: 17 days ago
:)Miner34 commented on Just a normal laser setup: 19 days ago
Ouch this is laggyvoxel commented on Roll!: 22 days ago
Finally got past the last part :3RI7 commented on Digital Counter Lab- needs your help![help] (here ya go i fixed it): 22 days ago
heres the original: https://archive.principia-web.se/level/3079RI7 commented on Digital Counter Lab- needs your help![help] (here ya go i fixed it): 22 days ago
oh that spinning thing is to test it faster