– (2005) – Modern vacationers become trapped in a summer camp that’s always 1981. Has a decent premise that provides plenty of opportunities to become an uninhibited Friday the 13th knock off, but suffers from terrible filmmaking and characters that aren’t even worth dying. Only self-aware jokes take advantage of the time gap.
The image is of the unrelated Swedish slasher (also titled Camp Slaughter) from 2004.
Good eye!