Pigman's Funhouse by the Harlow Bros.

Step right up. Step right in... ...to a place of unspeakable horrors. Best friends Charlie, Waylon, and Jay hadn't thought about Empty Pines in years - their secret hideout of bike trails, a creek to swim in, and a plywood treehouse hidden deep in the woods. One evening while camping out behind Charlie's parents' house, the nostalgia-craving, thrill-seeking teens decide to make their way back to their secluded kingdom. But unfortunately for them, Empty Pines isn't so empty anymore. The place is now occupied by a twisted individual known as the Pigman and his family of freaks, who have turned their once-beloved playground into his multi-stage concourse of torture. Welcome to the Pigman's Funhouse. Where the screaming doesn't stop - until you're dead.