House Party is an expansion for HOME set months after a college party massacre carried out by a masked killer. Players enter the now-abandoned frat house where the attack took place and begin uncovering the disturbing secrets hidden within.

As the characters investigate the violent history of the house the line between observer and participant becomes increasingly uncertain. The central question is whether they are uncovering what happened there or becoming part of the house's story themselves.

The expansion includes themes of slasher violence potential torture voyeurism and potential stalking.