Hey guys and gals! Here is my 100% Achievement Guide for Infliction!
Once you pick up the radio in the master bedroom, you will be transported to a police station. (The halls are a very nice light blue so you can tell when you are there).
Head around the corner to a vending machine, and keep pressing buttons until a small jump scare happens and the achievement unlocks!
Go to 20:50 in my video to see where and how this unlocks
Hope This Helps!