It was most definitely CoD 4. That was the game that made me buy my first xbox.
I loved everything about it except the team killing with randoms. At first I sucked but once I was introduced to more to the game I became familiar and caught up on my slack. There wasnt any disappointment with that game. The maps, weapons, and challenges were good. CoD nowadays seems dummied down and less interesting. Even the campaign was amazing. Loved everything about that game
Im going to buy that now..