Bugs

As the game progresses, the corruptive forces of the shadow spread to the user's CPU and memory. The ubiquitous bugs allow a new quality of immersion as the user, driven to the brink of dark, violent rage, punches a hole in the screen.

Alt-tabbing when any sound plays causes the sound to play on a loop.
Shooting a survivor triggers the fall over animation, but the death doesn't occur. Exiting the room and coming back resets the state and you can free them.
The Dangler,Soldier Buzzer and Worker Buzzer enemies are immune to damage while recoiling after a hit.
It isn't possible to shoot right when the character isn't facing left or right, e.g. right after entering a door or opening a container.