@WikiThe roles of BLUFOR compared to OPFOR. For example, even if it's from another FPS (not a milsim but still quite tactic) which is Rainbow Six Siege, when I get killed I'm pretty sure to have heard the voice saying "OPFOR eliminated". After all apparently, we incarnate in Rainbow Six Siege an agent from NATO who is from OPFOR. He is not an enemy because we incarnate an agent whose role is to annihilate the terrorists. This is at least what happens in the Situations. Ok, I stop being off topic.
The point is : why OPFOR are the enemies in Arma 3 but one from them, in another game, is a good agent?