Arnold Schwarzenegger was offered the role of Abraxas, but turned it down and opted to do Terminator 2" (1991) instead.
Originally rated R by the MPAA. After a topless scene was cut, the rating was changed to PG-13.
The "anti-life equation" mentioned in the film is a concept created by comic book author Jack Kirby (I). In his Fourth World setting, DC Comics villain Darkseid's search for the equation inspires him to attack Earth.
The computer that Secundus uses at Thornburry City Hall is a Commodore Amiga 2000 with a Commodore 1084 monitor.
Jesse "The Body" Ventura wore a T-shirt promoting this movie while doing commentary at Survivor Series 1989.
Jim Belushi: Principal Latimer, which was a nod to his role in The Principal - Una classe violenta (1987). The role was a favor to his then-wife Marjorie Bransfield, who plays Sonia.