So this one is a 3 pack instead of just 1. You can play the previous games in this nice one. Also, you can choose whatever weapon you want that's available for the mission you on. You can use cheats to get all guns so that's not a problem. There's 4 campaigns for this one. Iraq war, WW2 pacific, WW3 humans, and WW3 mutants. The first 2 make you choose both sides with guns availble to them. There are new weapons like the ones used for the WW3 campaign. Pretty fun to play. I give this game a 10 out of 10 because you get 3 games put into one.