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 and Android, download it today.
This site, principia-web, 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
- Sep 10, 2023 – Follow Principia on Mastodon!
- Jul 10, 2023 – The new Principia Official Community Site Archive
- Mar 10, 2023 – Principia 1.5.2 Beta build 2023-03-10
- Dec 31, 2022 – Principia 1.5.2 Beta builds are here!
- Dec 26, 2022 – principia-web turns 2!
G-flow commented on Tensegrity in 2D: 1 day ago
wowG-flow commented on Bat Cycle "The Batman": 1 day ago
the other one is faster than batman xdG-flow commented on Batman, The Dark Night Bat pod: 1 day ago
it is pretty goodHellohi commented on Wireless Data Transfer: 5 days ago
It's greattttttttT
voxel commented on Centipede with robot arm: 9 days ago
There's literally an object called "sincos"G-flow commented on Interesting car game with leaderboard: 9 days ago
IS COOLG-flow commented on ROller's Pinball: 10 days ago
bro, ive got 12k and the ball got stuck noooooG-flow commented on airplane boxer engine 2: 10 days ago
this is incredible