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
- 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!
- Aug 11, 2022 – The Principia source code has been released!
- Mar 26, 2022 – principia-web is moving!
ROllerozxa commented on Cheddah's Amazing Wheel: 13 days ago
yea it really is amazingoatm22 commented on Cheddah's Amazing Wheel: 13 days ago
pretty amazing wheel tbhvoxel commented on HillChallangerEmin: 1 month ago
pretty hardDaniLucky commented on jetpack 2: 1 month ago
Try adding a stabiliser with .05 for linear and angular!beastie_bizzle commented on flight fighter V.3: 2 months ago
pretty cool. ypu might want to add a stabiliser to make it a bit easier to control the pitchMARRA92-AGAIN commented on Possible 25 positions Switch Base: 2 months ago
use the WRAP condenser if wanna make it loopMARRA92-AGAIN commented on Test Vehicle: 2 months ago
There is a chance the engine may glitch, i'm tryng to fix it remaking the top part but i have no idea why it happens :/.loveaabb commented on Langton's Ant v0.2: 3 months ago
1000*1000 might be too large :w: