9. Portal (360/PS3, 2007; PC, 2008)
Platform: 360, PS3 and PC
The cake may be a lie, but Portal is all truth. Another one of Valve's near perfect titles, it was first released on their console compilation The Orange Box, but took the long view when it came to first-person shooters. Arming players with a simple, but now iconic, portal-creating gun; the game challenged us like nothing before it. Maneuvering through space and physics, deadly turrets, fire pits, and solving mind-bending physics puzzles all made us want to shake Gabe Newell's hand personally. The game has never come close to having a poseur bite its style. The result is one of the most unique FPS ever created. A title blending macabre humor, incredible voice acting (thanks to Ellen McLain as the inimitable GLaDOS), and an awe-inspiring climax left us hungry for more.