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

Top rated levels More

Latest custom levels More

Latest adventures More

Want more? Check out the Official community site archive, a complete archive of levels spanning 2013 to 2018

Latest comments

Ropster commented on Interesting car game with leaderboard: 3 days ago

Interesting

Ropster commented on Another Destructible Car!: 3 days ago

Car is blocky which i like

Ropster commented on Wireless Data Transfer: 3 days ago

Fascinating, a machine that can send text!

Ropster commented on Simple consolе simulator: 3 days ago

This is cool

Mantar commented on Gravity Game: 5 days ago

This rocks

Mantar commented on squid game of glass bridge: 5 days ago

Being able to shoot the platforms is neat, in a bigger level it feels like this would reward cleverness.

G-flow commented on Large Dummy: 5 days ago

it looks good

Glados commented on Need lua help for spinning this wheel: 12 days ago

Just apply torque to the entity and done