I play it with a small group of friends but its easily single-player as well.

ARMA 3 | How to Add a Mission Once you've downloaded your Arma 3 Mission, you will need to get the mission on the server. The game's third installment is no exception - and there's a reason why four years after ArmA 2 Day Z + Arma 3 interview - on Left 4 Dead, Skyrim, player emotion, and in-game disease.