If the NPC stumbles on a dead body the emergency services are called and corpses are body-bagged while the cops do a basic patrol which might reveal other murders.

Players can set traps (poisoning drinks, exploding speakers, destroying dance floors, cutting down trees, starting fires and short-circuiting electricity boards) to kill and influence partygoer movement and actions.

[2] Initially, you play as an unnamed man who is described as "a guy who just wanted some peace and quiet" who finds it difficult to sleep when there are active party-goers nearby.

The completion of these levels also unlocks the storyline, which focuses on the Party Hard Killings of Autumn 2000, as detailed by Police Inspector John West.

The story starts in the present with John being interviewed in the interrogation room by a mysterious man named Darius, who asks him about the killings.

His narration, as well as the game, starts in the year 2000, somewhere in San Francisco County with the killer, fed up with the noise and of a small neighborhood party.

He then takes a knife and a hockey mask to start a massacre at a BBQ house party somewhere in North Beach (Salinas, California according to menu map).

John finds them when the party bus gets stuck on the road after they killed the driver, but it is too late since the killer has already slaughtered his daughter.

The killer was almost about to put himself in jail, until on the way through the forest he somehow left John unconscious and cut down a tree, causing it to fall on the police car.