Twilight Princess. I got halfway through, stopped playing because I was writing my thesis, and haven't picked it up since. I keep meaning to pop it in, but something else comes up. Lego Batman is still in the shrink wrap. I didn't make it far past the intro cutscene in Enchanted Arms. And Bioshock. Never got very far in that game either. The atmosphere in Rapture freaks me out, even during the day. Last, Halo 3. I really liked Halo, Halo 2 was ok, but Halo 3 I can't bring myself to play much of. I borrowed it from a friend awhile ago after I played through Gears of War and was FPS'ed out.