Star Wars: Knights of the Old Republic
I just started it for the first time. Yeah, I know I should've played this game a long time ago, but the fact that it's Star Wars always kind of made me uninterested.
Alpha Protocol
It was on sale for 2e and I thought "What the hell, that's practically nothing." I played the game in a weekend and really ended up enjoying it.
Warhammer 40,000: Space Marine
Pre-bought it on Steam. The gameplay is great fun, story is a bit basic but the WH40K lore makes it up.
Deus Ex: Human Revolution
Also a pre-purchase. And amazing game, not much more to say.