Screenwriter 'Joe Halpin' is quoted in the book "Seagalogy: The Ass Kicking Films of
Steven Seagal" as saying that "Attack Force" had originally been written and filmed as "Harvester," a sci-fi/horror movie with Seagal and his men battling an invading force of vampire space aliens. After Seagal, Halpin and director
Michael Keusch had delivered the finished sci-fi film, the production and distribution company decided to eliminate the sci-fi space-alien elements and replace them with another plot having about a super-addictive drug that turns its users into superhuman killers. They called back a few of the lower-paid actors for re-shoots, re-dubbed the majority of Seagal's dialog via ADR, totally re-edited the film and changed it into the "Attack Force" we know today. Seagal and Halpin were not involved.
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