A downloadable game for Windows and macOS

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King Of The Hill update now available!

Xbox support is unstable.

Hello, and welcome to Planet Squares Incorporated.
The Universes Finest Square Producers

Please gather at least another intern to commence testing. Maximum 6 interns. Planet Squares Inc. Testing Apparatus™ currently supports keyboard and Xbox Controller input. Please note the "box" in Xbox is not accidental.

As of currently, P.S.I. supports four forms of polygonal quality testing. Please note that "Capture the Hat" and "Team Free For All" achieve better results with large groups.

P.S.I. does not hold itself responsible for injury, death, after-death and radiation poisoning. Please, do not forget to clean the toilets.


  • Local multiplayer
  • Square on square action
  • Fast-paced party gameplay
  • 5 gamemodes (+ "Practice Mode")
    • Free For All
    • Team Free For All
    • Capture The Hat
    • King Of The Planet
    • Marked Man
  • Controller Support
  • Terrible, terrible gags
  • Grump heads

Planet Squares Inc. thanks:

-Miguel F. Duarte

-Maria S. Paes

-Geoplex (Background music)

-Unikorn (Original Soundtrack)


-Nicolae Berbece





-NASA (Space Sheep logo background)



- @Fweber, @tiago and @NeoLeo for beta testing the Planet Squares Inc. Testing Apparatus™

Planet Squares Inc. is the work of a self-taught 18 19 year-old programer, deving away between school, exams and music lessons. Special thanks to:

  • His girlfriend, Mariana, for often putting up with game ideas and screenshots more often than not, and for all her support
  • Matt Tuttle, for helping out with his lib, HxNet, though not used in the final version
  • Dave Flemming, for allowing me to publish my first game
  • David Gomes, for actively promoting the game
  • My family and friends, for putting up with me, in general.

Got a couple of Xbox controllers and a few friends? Shoot me an e-mail (miguelmurca-at-gmail-dot-com) if you want to help me test things out!

Patch Notes:

- Fixed Mac KOTP distribution. Added README.txt again.

PlatformsWindows, macOS
Release date Aug 05, 2015
Rated 4.0 out of 5 stars
AuthorMiguel Murça
Tags2D, Colorful, Controller, Funny, keyboard, Local Co-Op, Local multiplayer, Multiplayer, Space, Versus
Average sessionA few minutes
InputsKeyboard, Xbox controller, Gamepad (any)
MultiplayerLocal multiplayer
Player count2 - 6


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Click download now to get access to the following files:

PSI Windows 1.0.zip 61 MB
PSI Mac 1.1.zip 55 MB

Development log


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What an amazing game. On OS X, when you leave the game with Command-Tab, you can't go back though. Other than that, excellent job!


Fixed (y)