Top 3 ::
Mass Effect 2 and 3
Crysis 1 and Warhead
Left for Dead 1 and 2
Crap ::
Crysis 2 and 3 - Killed the franchise. Watered down everything that made the 1st two great. New York sucks.
Frontlines Fuel of War - Was a gift but I felt ripped off.
Darksiders - Very meh, very ugly (PC)