yes
Yes.
No they cant arma 1 mods go with arma 1 arma 2 mods go with arma 2
Yes
Go on to their website or just search on google "arma 2 latest patch"!
No. you only need Arma 2 Operation Arrowhead
Only for the half life 2 version of garry's mod.
you can play as a Reacon or Sniper in the ArmA 2 editor.
probably Garry's mod
no
No, ArmA 2 is only avilable on Microsoft Windows and there are no plans to release it on other platforms.
yes
ArmA II is commercial work and therefore is not free. However, a free version of the game, titled ArmA 2: Free, was released that, although has no costs, has limited features compared to the full game.