Investigation of EVP is the subject of hundreds of regional and national groups and Internet message boards. Paranormal investigator John Zaffis claims, "There's been a boom in ghost hunting ever since the Internet took off." Investigators, equipped with electronic gear—like EMF meters, video cameras, and audio recorders—scour reportedly haunted venues, trying to uncover visual and audio evidence of ghosts. Many use portable recording devices in an attempt to capture EVP. Films Films involving EVP include Poltergeist, The Sixth Sense, and White Noise. Video games Sylvio is an indie-developed first-person horror adventure video game released on Steam in June 2015 for Microsoft Windows, PlayStation 4, Xbox One and, OS X, utilizing the Unity engine. The game is about an audio recordist called Juliette Waters, who records the voices of ghosts through electronic voice phenomenon. She finds herself trapped in an old family park, shut down since a landslide in 1971, and she now needs to use her recorder to survive the night. A sequel, Sylvio 2, was released on October 11, 2017. Phasmophobia is a co-op horror video game, in which a team of one to four players play as ghost hunters who try to identify hostile ghosts in varying locations. The game features a Spirit Box item used to capture EVPs of certain ghost types, which helps the players identify the type of the ghost they're dealing with. EVPs in Phasmophobia consist of singular words, such as "here", "attack", "death", "adult", etc., each denoting a response to a player initiated question. TV and radio It has been featured on television series like Ghost Whisperer, In Search Of… (1981), The Omega Factor, A Haunting, Ghost Hunters, MonsterQuest, Ghost Adventures, The Secret Saturdays, Fact or Faked: Paranormal Files, Supernatural, Derren Brown Investigates, Ghost Lab and Buzzfeed Unsolved: Supernatural Coast To Coast AM hosts George Noory and Art Bell have explored the topic of EVP with featured guests such as Brendan Cook and Barbara McBeath of the Ghost Investigators Society, and paranormal investigator and 'demonologist' Lou Gentile. The Spirit of John Lennon was a pay-per-view séance broadcast in 2006, in which TV crew members, a psychic, and an "expert in paranormal activity" claim the spirit of former Beatle John Lennon made contact with them through what was described as "an Electronic Voice Phenomenon (EVP)." The Doctor Who episode "Dark Water" features a fictional facility which was allegedly based on this principle. The Egyptian