Apparition is a roleplaying game for 4-5 players, which takes between 2-4 hours to play.
Most players take the role of Spiritualists, exploring a reputedly haunted location to prove (or disprove) the existence of one of its ghosts. One player takes on the role of the Psyche, who facilitates the game, asking questions to prompt roleplay and acting as the Apparition in the final phase of the game.
As the Spiritualists explore a haunted location, they ‘reveal’ clues to the nature and identity of the haunting. They are in fact defining that haunting through the power of their belief, which the Psyche uses as the Apparition.
All you need to play is a small number of six-sided dice, some scrap paper, and a few buttons.
Source: The Developer's Website.