Apex Computer Productions was the brothers John and Steve Rowlands, British based game designers and programmers on the Commodore 64 in the late 1980s and early 1990s.
[1] They programmed in pure assembly language and their earliest commercial release was Cyberdyne Warrior, a platform shooter, for Hewson in 1989.
In a startling coup—since Thalamus were associated with a rival magazine publisher in Newsfield, the home of ZZAP!64 — Commodore Format (Future Publishing) secured the rights to serialise the development of the game, which again proved very popular.
Thalamus collapsed shortly after the publication of Creatures II, as the Commodore 64 had started to wane in popularity.
Mayhem in Monsterland was given a "perfect" 100% score when reviewed by Commodore Format magazine.