Destruction Imminent 
 
 
 Year : ???
Publisher : Cunning & Devious Games
Genre : Doom clone
This game is not protected

(659 Kb) 
 
Programming, music and sounds: Andrew Gower; graphics: Paul & Andrew Gower.

This game is really close to Doom, and with much better graphics than Substation. It was coded by the authors of Battlezone (the Worms clone, not the arcade game).