Haven't played it yet, but I'm an Arma 2 fan nevertheless. The game as I understand is still in a WIP state, so I think we can expect a lot more good ratings.
I would say go for it. Having watched a lot of Z gameplay movies I think it's one very dynamically addictive game. Also worth getting buddies to get the game too, as Arma 2 multiplayer is notorious for housing trolls and anti-team players.
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