Brian Eklund

These zombies are a human-like race created by Satan. When the "zombie-looking freaks" begin taking over the world, dirty cops Jeff and Cage find themselves in the unenviable position of having to stop them before it's too late. Jeff soon learns that he alone has the power to defeat them if he's up to the task. As the body count piles up and internal affairs officers investigate Jeff and Cage for their prior wrongdoings, time is running out..

Some kids go to an old Haunted House attraction to learn about Fear and participate in a study. Once there, some crazy killer starts taking them out.

Party house is actually portal to evil dimension, and horde of murderous beings slaughter partygoers, then homicidal children attack cars, before evildoers are all pulled back through the portal to invade another dimension.