The cast includes Jesse Vint, Dawn Dunlap, June Chadwick, Linden Chiles, Fox Harris and Michael Bowen.

It was generally panned by critics as a cheap, exploitative imitation of the movie Alien, with sex, nudity, uneven editing, cheap special effects, and a sound design which some moviegoers found unpleasant, although the electronic music score produced by Susan Justin received mostly positive attention.

It is frequently paired with and compared to the previous year's Corman-produced Alien rip-off Galaxy of Terror, with which Forbidden World shares some of the same sets (designed by James Cameron).

The staff of the station includes the head of research, Gordon Hauser, his assistant Barbara Glaser, lab assistant Tracy Baxter, lab technician Jimmy Swift, electrician Brian Beale, the station's head of security, Earl Richards and Cal Timbergen, the medical doctor.

The result is that the victim's living body slowly erodes into a gelatinous pile of pure protein which Subject 20 consumes for sustenance.

[4] During editing, Holzman discovered he had insufficient footage of the titular mutant and called in John Carl Buechler to redo some of the sequences.

On August 13, 2019, Scream Factory released Forbidden World on a single disc Blu-ray collectors edition in a steelbook.