My ArmA X Anniversary Edition just arrived in the mail. ArmA (Or Armed Assault) is a military simulator based on the VBS used by many armies around the world. This "game" pretty much has everything for everyone. Using mods you can convert one of the games to a WW2 simulator if you want. The box has all of the original simulators, as Codemasters bailed out of the simulator business, stole the Operation Flashpoint name and left Bohemia Interactive on their own, Operation Flashpoint Dragon Rising and Red River (Which are pretty much the same stuff as Call of Duty games, run and gun). The complete list of simulators is as follows:
Operation Flashpoint: Cold War Assault + Resistance (Named Arma cold war assault due to copyright restrictions
Arma: Gold, has both Arma 1 and its expansion, Queen's Gambit
Arma 2: Operation Arrowhead
If you have a computer that can run these games, give them a try.