A good single player game is Fallout 3. Pretty fun game.
Don't get sucked into the MMO's :P I play EVE online and it quite honestly will end my soul.
Capsulier arent ya? Where do you fly? You can find me around Juunigaishi, Ikao and I roam Jita for PvP.
OMG!
And I played fallout 3 extensively. I installed a few mods that made the game so much sweeter than it is.