S.T.A.L.K.E.R. I just never got into it. It really started to suck a quarter of the way through, IMO.
Spore, because doing the exact same task 900 times is not my idea of fun.
Oblivion, once I finished the Dark Brotherhood quests there wasn't much point, all the good parts were over.
Far Cry, somewhere after the hang glider part I really got sick of the game.
Never Winter Nights 2, I always lost interest by the Luskan Trial.
C&C Kains Wrath, because it sucked... Actually you can add half of EA's abominations to the list, I finished some of them but most of them weren't worth completing IMO.
Spore, because doing the exact same task 900 times is not my idea of fun.
Oblivion, once I finished the Dark Brotherhood quests there wasn't much point, all the good parts were over.
Far Cry, somewhere after the hang glider part I really got sick of the game.
Never Winter Nights 2, I always lost interest by the Luskan Trial.
C&C Kains Wrath, because it sucked... Actually you can add half of EA's abominations to the list, I finished some of them but most of them weren't worth completing IMO.