MUA2 Is a lot of fun, and I've gone through the story multiple times, if you can find some friends to play with it's even more fun. WFC is a cheap Gears Of War rip off, and I never even finished the story because it was so boring, that being said I still play the multiplayer quite a lot and it is very addicting and fun. Never played Shattered Dimensions. If you already play COD, then there is no reason to get WFC as the multiplayer is the same almost, unless you just want a change of pace once in a while.