Holy crap, what do I do now?

So you've played through all of DOOM, and suddenly can't figure out how to take out the Cyberdemon? I mean, you'd think it'd be pretty obvious at this point.

Of course, this is a PRO tip! Maybe amateurs try to lick it until it dies, though... or perhaps they try to tell really bad jokes until it dies of groaning.

I miss DOOM. First person shooters were actually a novel thing then. Now they're just... more of the same.