Dragon Age 2
third act, a few quests every couple of months is enough
Crysis 2
only finished it recently, but it was a work in progress for months. I'm one of those players who -has- to do a section either fully stealth, kill everything unseen or just run and gun. Its too bad that I didn't find much replay value in it as a result, oh well, sequels.
Cod black ops
Considering that it was released in a half finished state for pc, I could only take the choppy visuals in small doses.
FF10 (Yea...)
Grinded out in the monster arena to the point where the final battle would be trivialized(got the 200 lightning dodging weapon even). My gf spoiled the ending as I was finishing up getting the last ultimate weapon. I think its one of those games where I -should- finish, but since the story isn't much of a motivator anymore.. eh.