its not really so much for the accomplishments but for many games the online play MAKES the game because once you beat a game often times your just done with it but games like GRAW 2 and Gears of War...once you beat them it allows you to play even more and truely get your moneys worth on a game

well i just found out in nfs carbon... do not start a new career and use the same username!!!!!! i had beaten all the challenges, beaten career mode, and had almost every reward card.. i went back in using the same username and everything even the cars i designed outside of career mode vanished!!! i hope this only happens when you use the same username and not just when you start a new career altogether

just the same username i believe...that sucks...most games let you name the save file....for a certain career

well it did let me name it again i just didnt know that saving over it would lose everything i did other than achievements I'm hoping that if I don't get all the reward cards this time I can use a different name and finish it up rather than having to start all over again because some of those reward cards would take months otherwise