Doom's monsters likely haven't scare you in well over a decade, not since Quake's zombie rottweilers and gigantic, blood-stained Shamblers took over your nightmares in the mid-90s.

These pieces from Brandon Duncan, though, are a reminder that those monsters still lurk in the dark recesses of your memory, ready to pop out when you least expect it and send you running backwards out of a room while firing your shotgun with no regard for aim or your limited ammo.

Duncan says the Doom series was "a huge inspiration" to him, and you can see it in many of his illustrations. He drew from his teenage memories of the game's monsters scaring the crap out of him to create this "Doom Bestiary" set: