up Texas Chainsaw Massacre family which is the best known first final girl/gore fest type movie. It set a genre on a shoestring budget. Their were other slasher exploitation flicks at the time, but it broke out into the mainstream and established Tobe Hooper.

Michael Myers of Halloween fame is probably the first well known of the unstoppable slasher types. It is actually a better cinematic experience movie (mainstream).

Ironically Jason of the Friday the 13th series only has a minor role in the first movie. After that it kind of follows Halloween with more sex. He even eventually adopts his own distinctive mask.

There are two other final girl movies that came before Texas Chainsaw Massacre. The one who appeared in The Last House on the Left (which is a thoroughly unpleasant experience to watch) and Black Christmas.

Black Christmas can be viewed as predating Halloween with the unstoppable killer in the house. It is a pretty good flick.

For Jason to snag that mask from one of his victims...

I have had too many happenings in real life.

Anything that was ever good about them was in the originals.