Jerykk wrote on Feb 27, 2013, 04:39: I'm pretty sure ArmA3 isn't going to be a Steam exclusive. It will use Steamworks but still be available for purchase from other digital distributors, just like every other Steamworks game.
Will I be able to buy a boxed copy of Arma 3? a. There will be boxed copies in most regions. These may either be Steam Codes in a retail package, or also contain DVD data (speeding up installation). You will still have to run and update through Steam the first time.
So like Jerykk said you will be able to buy the game other places not just Steam but the game uses Steamworks so you will need Steam to run it.