The supernatural
Ghosts and zombies. Perhaps the funniest of all the enemies you'll encounter in gaming, but still a little scary, making them all the more rewarding to kill. Or, seeing as they're dead already, banish into the void. Zombies are the most common and defeating them has given way to a highly imaginative assortment of second deaths. We've shot them with lightguns, typed them to death, flamed them, exploded them, decapitated, dismembered and lobotomised them, run them over with lawnmowers and impaled them on spinning spikes. And that's not to mention the shower-head-in-the-cranium special from Dead Rising. Hehehe.
As for ghosts, Luigi has vacuumed them up, the Ghostbusters caught them in traps and Project Zero's camera caught them all saying 'cheese'. And we must say, looking at the pics below makes us want to get out all these games again. We love zombies. In a totally non-physical way, of course. Er... moving on, then...
Above: Luigi's Mansion, Project Zero, Dead Rising, Infected, Pac-Man, Resident Evil and The House of the Dead III