Who wrote the 2006 horror film of which "Hillside Cannibals" is a mockbuster?
Hillside Cannibals:  The film is a mockbuster of the film "The Hills Have Eyes", another film released around the same month, but its plot also incorporates elements from other films, including "Cannibal Holocaust", "The Texas Chainsaw Massacre" and "House of 1000 Corpses". The Hills Have Eyes (2006 film):  Written by filmmaking partners Alexandre Aja and Grégory Levasseur of the French horror film "Haute Tension", and directed by Aja.
Aja and Grégory Levasseur