Marcus Dunstan was born in Macomb, Illinois. He spent his formative years working in movie theaters and studying film at the University of Iowa. While in college, Dunstan experimented with 16mm film, often using himself as the guinea pig in poorly executed stunts that left him dragging behind a car, the target of flying knives and thrice being set on fire. He holds the record for spilling the most fake blood ever in a student film. Since moving to Los Angeles in 1999, Dunstan toiled in several odd jobs, including a retirement home, an Optometry clinic and a video store, while spending his nights writing on a borrowed computer from fellow screenwriter, Patrick Melton.
In March 2005, Dunstan and Melton won Season Three of Project Greenlight with their screenplay, Feast, which was directed by John Gulager. The film starred Krista Allen and Eric Dane, and was produced by Dimension Films and Neo Art & Logic.
Throughout his career, Dunstan has written the screenplays for Feast, Feast 2: Sloppy Seconds, Feast III: The Happy Finish, The Collector, Saw IV, Saw V, Saw VI and Saw 3D. He was also involved in the pre-production and post-production for several of his other screenplays. In addition to writing the screenplay for The Collector, he directed the film. He also directed the sequel titled The Collection. The film, produced by Liddell Entertainment and Fortress Features, was released in 2012.
In addition to writing and directing, he and writing partner Patrick Melton have made cameo appearances in Saw V, Supergator, Feast and The Collector, appearing in the later two through the same puppet show clip shown on TV screens. He, Melton and Stephen Romano co-wrote the thriller novel Black Light - Don't Look Too Deep, which was published on October 5, 2011 over Mulholland Books as hardcover. The novel was adapted in a feature film written by Patrick Melton and Dunston, under the direction of Stephen Romano. Dunstan and Melton also co-wrote a potential eleventh film of the Halloween franchise. He also wrote additional dialogue for the Saw Escape Room in Las Vegas.
|2008||Feast II: Sloppy Seconds||No||No||Yes|
|2009||Feast III: The Happy Finish||No||No||Yes|
|2014||When They Say You're Alone||No||Executive||No|
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