Game Trailers, on top of providing a good source for video material distributed by the designers and distributors of video games, has sometimes a good video review of games. Here comes one: TimeShift from Sierra, one of the few First Person Shooters being handed out before Christmas.
link to GT video
link to HD video
Definitely an interesting game. A traditional FPS game with a few twists like the ability to play with time: You can go back in time, you can freeze time, and use these in your combat tactics leading to pretty much anything that was completely inaccessible in other games. What makes it nice is that despite being ported from a console to the PC, TimeShift still looks good and very playable (usually, console games turn being plain crap when ported to the PC).
Well worth putting on your Christmas gift list.