well now, 3 good games put into a poll-like question. assasins creed is a great game but u won't replay it ever, or if u do, its to get the templars or flags. the game gets better as u go through the game (u get more abilities). i have played assasins creed and have to say that although it is a great game, i would never want to play through it again. if u have seen the movie 'wanted' then u now have a good idea of the plotline of assasins creed. i have only played the demo and a little bit of bioshock's beginning, and it didn't appeal to me. i have nothing more to say about bioshock. i would highly suggest trying out Call Of Duty 4, if u liked rainbow 6 vegas. i played R6V and R6V2 and like all first person shooters, but the story line of call of duty 4 is amazing and should be concidered. now for the good part. i play halo religiously. it is worth buying XBL to play this game online, there is no other game like halo 3 and even though i like all the other games i own at the moment. i find myself playing halo every night. i like the story line too, its easy and even on legendary it isn't as hard as halo 2.