Originally Posted by Frogstep
Does anyone know the exact number of enemy types you have to headshot for The Only True Stopper achievement? I have headshotted what I think to be every enemy type including the running dead and have not had it pop up yet.
Make sure you get the headshot on the heavy flamers, you will get an explosion kill very easy on those guys. And for the headshots if you shoot every type of enemy you ran across.
You can define them by weapon type, different weapon is an different enemy.
My last hostage rescue mission only showed up after i completed the game, I dont know if this is normal?