I have never played games for the achievements, but now I am replaying games to get them so that I get as much out of my games as possible. I have replayed Quake 4 now for the 3rd time and just getting some of the weapons achievements and on Gears some of the normal ones like mix it up. The weapons ones I will just have to get over time. I am going to go back and replay Lost Planet soon and do the same thing. I am sure I will only go back and play the games I hang on to and play them out. It is more of getting the max out of the game than trying to be the top achiever in the xbox world.