Check out this FPS!
It's a project from some students of the University of Southern California. A puzzle-like game in the same spirit as Portal.
But for once, the idea isn't moving through space, but through time!
Armed with a time travel gun, you have to play with this interesting gimmick that simply isn't just enough used.
(I'm sick of all these "gravitiy guns" in games, I wanna play with time instead!)
I like the idea of this new genre of "smart" FPS inspired by Portal. Much better than all those war games like Call of Duty, etc..