ARMA 2 is required?

[meti]

Is ARMA 2 required for this game? Edit. if yes, has it to be installed on box distributed game, or can it work on version from the steam?

[ProfTournesol]

Is ARMA 2 required for this game? Edit. if yes, has it to be installed on box distributed game, or can it work on version from the steam?

No it isn't required.

[Nicholas]

Nope, this is a completely separate game from ArmA 2. The only similarity is the engine.