Eliminator is a 3D shoot 'em up for home computers published in 1988 by Hewson Consultants. Versions came out for Amiga, Amstrad CPC, Atari ST, Commodore 64 and ZX Spectrum. More information on Wikipedia.

Nebulus is a video game created by John M. Phillips and published by Hewson Consultants in the late 1980s for various home computer systems.