From its rise in the 1970s to its heyday in the 1980s to its metatextual reinvention in the 1990s, the slasher movie is a horror subgenre that, like many of its villains, just won't die. Like a lot of horror premises, the setup of a killer -- often masked, often toting a signature weapon -- preying on a group of unsuspecting victims is malleable enough that it's launched hundreds of different stories, and the killers themselves are often so memorable that they inspire plenty of sequels.