Hello everyone here is a gameplay to unlock the achievement by exactly following the steps it's gonna be unlocked for you, It's very straight to the point but remember to kill the 2 injured Red Army soldiers on the bed, and move on to the fascist soldier that is guarding the three Red Army prisoners, let him finish his nonsense and kill the middle one then kill him and the remaining two Red Army soldiers. Hope it Helps. don't forget to tell me your opinion thanks