Fallout 3. My brother loaned our copy to a friend and said friend vanished off the face of the earth, so now with New Vegas bugging out on me every couple minutes [I literally couldn't finish the quest I was on even though I was at the place and just had to kill some legionaries] I pulled out an old gift card, headed to the nearest Gamestop, and found a copy on sail for $12. I don't regret it