Xbox 360

Built from the ground up for cooperative play and supporting OSX, Linux, and Windows, Left 4 Dead 2 definitely belongs on this list. And for a short time during the holidays in 2013, Steam offers the game for free!

Markus "Notch" Persson created this block-based game in 2009 using Java. Years later, versions exist for PC, OSX, iOS, Android, and Xbox, with a PlayStation version in the works. 

Megalomaniacal AI Durandal has captured a Pfhor scout ship and taken it to the homeworld of the enslaved S'pht in hopes of finding the secret of the lost clan that can end their slavery.