Late Night Caller(2007)

Overview:

Late Night Caller is a slasher horror machinima centered around a quiet neighborhood where a series of disturbing phone calls escalate into a night of terror. A group of teenagers begin receiving cryptic, threatening messages from an unknown caller — who seems to be watching their every move. When one of them turns up dead, the tension explodes into violence, and what begins as a prank spirals into a full-blown killing spree. As the body count rises, secrets unravel, and the surviving characters must figure out who the killer is — before the next call comes through.