【CAMPAIGN】Evade a Scagdead's instant-death attack.
The Scagdead is a hulking monstrosity with a sort of chainsaw-like arm that he'll use to finish you off if you're in range of it. Prior to his finishing move, you'll hear the chains revving up, queuing for your up or down + dodge. This may take a few attempts, but it's definitely a nifty skill to have when you take these guys on.
You can achieve this in Chapter 3 when you're going to talk to the Comms guy, who - go figure - is no longer a Comms guy, but is instead a massive chainsaw wielding maniac. Once you reach the door you'll see him bashing on it from the other side, and if you shoot the chain on the door from a few feet away you should be able to get this achievement almost immediately after the chain breaks as he will rush straight for you after crashing through the door.
Note that if you go straight to this door from the shutter that you just passed through, it will allow you to restart just before the shutters if you mess up and end up getting a hair cut.
Location: Episode 3-2 You will encounter a Scagdead on the Promenade Deck in Episode 3-2. You cannot miss this enemy, it's part of the main objective. It will appear after shooting the lock of a door. Just stand in front of the Scagdead and wait for it to attack. You will see a short animation when it's about to attack. That's when you need to press the left stick and A. There is a checkpoint right before fighting the Scagdead, so you won't lose much progress if you die.