This game is very reminiscent of Doom, in that it's a limited palette pseudo-3D shooter. It runs a little too fast on Anex86 by default, I'd suggest limiting the speed max to 5,000,000 under the "System" tab. Controls are the arrow keys, supplemented by Z,X,C and V. V shoots your gun, once you're outside the starting area.
This one has an odd start, you won't actually see the title screen and maze generation from boot, it just starts the game (you'll see both of those if you get a Game Over and it sends you there.) You start in a small village area with other humans, and then drop down a hole to find the demons, after picking up the gun and ammo. Exits to levels are of the same kind of "drop down a hole" type interface. Although the resolution is very low, there are multiple monster types and the scenery does change between levels.Download