My biggest let down was probably Call of Duty Black Ops. Not really because of the game itself (all the CoD shooters are about the same to me), but because the people who were so excited for it and told me I had to buy it so I could play with them all abandoned the game the moment I bought it almost. I got one day of playing with them (and they were still talking about how awesome it was throughout the day), but then suddenly they all said the game sucked and went back to Modern Warfare 2. It sucked since I only bought that game so I could play with those friends online.