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™

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
(2 total ratings)
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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If you go to Practice mode with two players, after 1-2 collides the game crashes on Windows.

(1 edit)

Hello. Thank you (sincerely) for taking the time to report this issue. However, this is a game that I made when I was 16 years old — just nearly 10 years ago at this point.

It’s frankly a small miracle that the game works at all: I remember looking at the source code a couple of years after publishing the game, and finding that the code that determined the victor in the event of a collision wasn’t doing anything too logical.

In any case, I think it still came out nicely; you’ll find I haven’t made anything as big or as successful since. But it is ten years old at this point, it came out when Windows 8 was the latest thing, and it has done all it could do, I think.

I don’t even have the source code for this game anymore. (Not at hand, at least, I think I know where I could go dig for it.)

What I’m saying is that I feel old, and that I ought to have reached some sort of statute of limitation, but if I stumble upon the source code for the game in my backups hard drive, I’ll take a look.

Best, Miguel

Wow, that's cool


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)