Storm (1987) High schoolers run afoul of old men trying to find a treasure in the Canadian wilderness
Shadows Run Black (1984) Resourceful sex-comedy producers use leftover budget to shoot this film, finally released in 1984 to cash-in on the slasher home video craze.
Tower of Evil (1972) Early 70s English-made horror with many plot similarities to 1980s American slasher films.