Bioshock

This is one of the best games of the last decade, in my own opinion. FPS, yes... But the fact that it's somehow scary if one plays it alone in the middle of the night is a surprising thing. I never imagined finishing this piece of art barely a month ago (I actually played it after office hours). Venturing a fictional underwater city called Rapture in Bioshock gave me such intrigue about the true nature of humankind. How dark one's heart and soul can be because of power. Such solid story and the advent of plastids and tonics (not to mention our good old Adam), players shall feel the creepy and odd environment underneath the ocean as they wander around fighting for survival to see the sun once more.