Fallout 3: New Vegas

[Great Rumbler]

Beat the game after about 40 hours, although I had to go back a couple of times to older saves to do some things differently so it was probably closer to 35 hours. Really great game, really fun. As of right now, I'd probably put it over F3 and ME2, but it's a really close battle and I could see myself changing my mind and sliding ME2 up to the top sometime.