@bobafanu, I presume this would be Windows based games... reasons, one of the titles poster mentioned was sniper elite v2 (which is out for the Windows, xbox360 and PS3 only platforms), and the other would be this is a windows based games forum... though, (you are correct about the 'etc.') the possibility is out there that the poster can also be talking about other possible FPS games and platforms in general.
I guess, I should have stated why I recommended ARMA II.
The game is held in the modern European theater (
ARMA 2 - Wikipedia, the free encyclopedia). While I do believe that you only play one side for the single player campaign, for multiplayer (which also includes community based mods, including DayZ), you can choose any sides... even civilian/rogue/independent in general.
There's also community made vehicles, example the VF1S Strike from Macross:
VF-1S for ArmA II (Trailer) - YouTube
If you are interested in playing the game, without spending money. The game is free to play.
Arma 2 free - Arma 2 Official Website. Certain restrictions does apply, scroll to the bottom of the page (after clicking the link) for more details.
No, I have not played this game yet, because I lack the patience for playing this game.