Friday The 13th 1980

Camp Crystal Lake is reopening. Eager young counsellors, eyes shining with idealism and hormones racing through their veins, are ready to lead guests in summer Kumbayas and games. But there's one game you won't find in the camp's guidebook. Someone likes to play kill the Counsellor.

He lives, they die. The he is Jason (who gets a big assist in his first movie from dear old Mom).