This game has been Greenlit by the Community!

The community has shown their interest in this game. Valve has reached out to this developer to start moving things toward release on Steam.

Platforms: PC, Linux
Languages: English
Players: Single-player
Aug 22, 2014 @ 5:46am
Sep 11, 2014 @ 4:55pm
Recent Announcements View All (3)
We need your help, support Principia on Indiegogo!
Principia Beta FREE to play until Friday!
Release date: 2014
Principia is an adventure game focused on advanced mechanics and electronics. Explore generated worlds or just play around with the physics, building your own contraptions in the sandbox.

Get beta 1.5 now![]

Adventure Features
  • Build as you play, move objects around, nail pieces together, connect electronics. Need a hovercraft? Just build it.
  • Explore generated worlds and find rare items
  • Modular robots with replaceable parts
  • Fun tools to dig caves, cut down trees, gather resources
  • Cool weapons!

Sandbox Features
  • Create levels from scratch or base them off of a generated world
  • Advanced virtual electronics system
  • Highly tunable physics to fit your specific needs perfectly
  • Over 200 unique objects
  • Over 50 adventure items (some of them locked until you've discovered them in adventure)
  • Scripting and modding support

Community Features
  • Active community with interesting people from around the world
  • Weekly building contests
  • Fun and interesting community creations uploaded daily, from giant mechanical robots to mini games, time lapses, heavy machinery, music, adventures and much more
  • Download other peoples' creations to learn from them or improve them
  • Get a golden crown next to your name by winning a contest!

Planned Features
Here's a few of the planned features, note that these are not yet in the game:
  • More interesting worlds with villages, swamps, quests (coming in 1.5.1)
  • Level bundles, add your own 3D models and textures to your levels
  • Cool weapons (robots with swords!)
  • More equipments, rare items found through quests
  • Plant DNA manipulation >:)
  • More enemies >:O
  • Improvements to fluids (current fluid is just an experimental mess)
  • You decide features, throw us ideas!
Popular Discussions View All (4)
Sep 29, 2014 @ 11:12am
Almighty Squid Girl
Oct 6, 2014 @ 10:38am
тема игры
FOX The SuperMan
Sep 14, 2014 @ 4:32am
Linux/SteamOS version?
< >
Swase Feb 7 @ 6:23pm 
I loved the android version and the PC interface will definately be an improvement over the clumsy touchscreen of my phone and the power should increase the amount of objects/size of things we build. Im so excited!
Slimebrik Feb 7 @ 2:41pm 
I got a idea, for a enemy make little Zap-bots, theyzap you and if you have a non metalic front back and head (Dummie head pioneer front and something else..) they do litle damage to none
Cepet Jan 15 @ 1:16am 
After playing this on Android I can't wait for the release! =D
Yoloasscrack Jan 7 @ 5:52am 
it is 2015 now still waiting :I
Godzilladoesstuff Dec 27, 2014 @ 10:58am 
When does it come out
mischa45 Dec 12, 2014 @ 12:37pm 
клас жду с не терпением
Slavs Nov 12, 2014 @ 10:11am 
Купил в Play market, теперь жду на ПК.
skidrow77 Nov 8, 2014 @ 7:09am 
игра класная !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Green-Toxic-Dragon Oct 28, 2014 @ 7:21pm 
how i vote?
Save90 Oct 28, 2014 @ 3:38pm 
Whant this free. valve add this