Need a new game.

[Zoidberg]

Bust out Nethack, ignore the graphics (or lack of) and give it a shot, it might not look like much but you might like it. If your looking for something more modern, Bioshock (mentioned by AceInfinity) is probably my favourite shooter of the past 5 years at least (weird to think that 5 years ago it was 2007, doesn't seem that long ago). A friend of mine picked it up pre-owned for £2 at some pawn-broker like shop, at a price like that you should really give it a go. There's also a sequel that I enjoyed (less so that the original however) that has multiplayer, but you should play Bioshock for the story-telling as well as the action, and for that reason I'd play the original first.