MGM Home Entertainment released this film as "Killer Force" on DVD in 2013 as part of the 12 Action Adventure Movies 3-Disc set. It's the first release since the VHS era.
Peter Fonda has a perm and a fake beard.
The mine offices shown in this film were situated in Silverton, Pretoria and were then the offices of the South African National Film Board.
Three cast members appeared in James Bond movies. Telly Savalas was Ernst Stavro Blofeld in Im Geheimdienst Ihrer Majestät (1969). Sir Christopher Lee was Francisco Scaramanga in Der Mann mit dem goldenen Colt (1974). Maud Adams appeared in three Bond movies as three different characters: as Andrea Anders in The Man with the Golden Gun (1974), as the title character in Octopussy (1983), and appeared uncredited in James Bond 007 - Im Angesicht des Todes (1985).
Both director Val Guest and actor Christopher Lee were staples of Hammer Films, but neither had worked together until this movie, which was not a Hammer Film.