Remember Doom? Remember locking yourself away from the civilised world in order to slay demons with a chainsaw? Remember those deathmatches that dragged on into the early hours? We miss Doom.
In order to pay homage to one of the most iconic shooters of all time, we have assembled a fiendishly difficult quiz on the first Doom game (with a couple of sneaky questions related to The Ultimate Doom update). Be warned, you'll only succeed if you know the corridors of hell like the back of your hand. They know you're here. There's no turning back now.