Civilization IV's pretty cheap these days. This is a good list. It's pushed me closer to getting Oblivion and Okami...

I. Elder Scrolls IV: Oblivion (PC) II. Civilization IV (PC) III. Harvest Moon: Friends of Mineral Town (GBA) IV. Animal Crossing (GC) V. Halo 2 (Xbox) The first three are in here for the sheer amount of content and replayability. Animal Crossing is here due to the changing way of the game and the joyful fun of it. Halo 2 is in there to give me an action filled online experience.