Hell House LLC III: Lake of Fire

The film, shot as a documentary, follows a group of Halloween haunted house creators as they prepare for the 2009 opening of their popular haunted attraction Hell House.
Set one year after the events of Hell House LLC II, the hotel is on the verge of being torn down when it is purchased by billionaire Russell Wynn as the new home for his popular interactive show, Insomnia. He invites journalist Venessa Sheppard and her crew to record everything happening inside the hotel leading up to the performance - but they soon encounter a more nefarious plot, one that threatens to unleash a veritable hell on earth.
The Abaddon Hotel will once again open its doors to the public and the evil lurking within shall finally be unleashed.