The Gate (1987)

Synopsis
During a boring, routine weekend, young Glen (Stephen Dorff) and his best buddy Terry (Louis Tripp) decide to explore Glen's backyard. Before long, the boys come across a strange hole in the ground which yields all manner of sinister prizes. Consulting one of his heavy-metal record albums, Glen comes to the correct conclusion that the hole is actually the Gate to Hell. Offering a sacrifice in the form of a dead dog, Glen further opens the portals of Hades, through which pass some of the most hideous demons imaginable. A surprise box-office hit, The Gate yielded a sequel, predictably titled Gate II. ~ Hal Erickson, All Movie Guide