Organization: Toxic Games

Let me just get this out of the way since the comparison is inevitable: The first person puzzle game Q.U.B.E. will immediately remind you of Portal. They're both set in stark environments with ambient sounds and a severe sense of isolation, all while you're making your way through a facility with a series of tests to challenge your sense of problem solving. While Q.U.B.E. might not be the classic that Portal turned out to be, it still holds its own.