online is best mate.... on cod4 you will have 55 ranking levels (each with their own different symbol)to get, after that you trade all 55 in to get prestige mode which then gives you 1 rank for 55 levels (and a different symbol)..... unfortunately there are over ten prestige modes and after several days playing time i am still 4 prestige modes away.... it takes ages....the aim is to get the gold cross
WOW has 65 ranks which are harder to get giving you the option of prestige mode at the end the same as COD4
Prestige mode just gives you a different symbol to show how progressed you are, although you can choose to complete as many challenges as possible instead of going prestige, once you complete all challenges your weapons will all be gold
