A game revolving around the manipulation of time, eh? You've probably already dismissed it as something like TimeShift or Prince of Persia, where you'll use a magical wristwatch to slow down a whirling propeller blade to use as a bridge, or reverse time to stop yourself falling down that ruddy great pit.
But there's a fundamental difference with Singularity, the time-twisting shooter from the legends who made HeXen and Jedi Academy. Raven Games are aware that time manipulation has been around for a while, so they've turned you into the victim. You don't control time, but time controls you. It's not as simple as that, of course – but as far as starting points go, it's an exciting and refreshing one.