Deus Ex: Is definitely worth a look, which is a strange thing for me to say as I have stopped playing it, I got bored. I prefer my shooters a bit more full on whereas this is more stealth. I will finish it though and I would recommend it.
Fear 3: If you can get it cheap its worth a play, quite hard in parts, but nothing really to make the game stand out.
Duke Nukem: After so many years in the making a real disappointment, but in fairness a competent time waster.
Dead space 2: The one game recently that I have thoroughly enjoyed, without a doubt get it.
Crysis 2: Nothing to get that excited about, beautiful graphically but not to exciting game-play, still worth a go.
Hard Reset: Cheap and not particularly good,OK for dipping in and out of but does not lend itself to a lengthy gaming session.
Those should keep you going.