Two candygrammers in Afghanistan need to deliver candy. One is red, and one is blue. Each can only see objects of his color. Players must communicate to help each other get through the level. You need gamepads to play this game. It's currently split-screen, so stick a piece of cardboard in between to prevent each other from seeing each other's screen. There is a partially-tested networking option, which requires one player to run the Unity Master Server program (https://www.sugarsync.com/pf/D8592074_88303929_856463) (source code at http://unity3d.com/files/master-server/MasterServer-2.0.1f1.zip).
Tools and Technologies:
Unity (any product)
Uses XInput to do controller input. Works with 360 controllers, should work with others, too.
Unzip and run Candygram.exe
Daniel Holbert - Programming/Design
OpenGameArt.org - Textures
Stefano Galli (via Archive3D.net) - Tent Model
Also check out the game that I've developing professionally--Paperbound. It's like Smash Brothers on crack. Towerfall meets Inception. http://www.paperboundgame.com