Torillian on 25 June 2009
Game that'll last you that long, my first thought is Disgaea 3. If you really get into that game you could definitely spend months on it.
If you aren't into SRPG's then a good idea might be LBP, and you can just troll through the user created levels and make your own.
If you can get into multiplayer than Killzone 2 might be able to last you that long.
Think that's about it.
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