From REC to Dawn of the Dead, these all-time great zombie movies deserve to be called masterpieces.

You know the deal with zombies in movies. Sometimes, they want to eat brains, sometimes they're out of control and kind of rabid, they're sometimes slow, and then at other times, they're super quick.

Grebey is a contributor for TIME. Clockwise from Top Left: 28 Days Later, Night of the Living Dead, Evil Dead II, Resident Evil, Shaun of the Dead, Dawn of the Dead Clockwise from Top Left: 28 Days ...