BTW, concerning Evil's Doom like games... years ago I worked also on a game on that style, but never finished it... if anyone wants to finish it, contact me

(SteffenH@hyperion-software.de)
The GFX Engine was blockgraphics based, but had (like Evil's Doom) Highres Graphics. It was GFX Board only (while Evil's Doom was AGA Only). It was possible to move into all different angles (including "Up", "Down"), of course only in 90 Degree steps. Hmmm, if I remember right it was actually 45 degee steps, not sure anymore, it has been so long ago

While Evil's Doom was an actual game-demo, "my" game was not much more than a walkthrough graphics engine, though.
Steffen