zwanzig_zwoelf
Graverobber Foundation
Wolf3D is a good game (except for some rage-inducing levels here and there). Doom is a step up in most areas, but it doesn't mean you can't fire it up once in a while and have some dumb fun.
If you want a 'thinking man's Wolf3D', take a look at Tetsujin for 3DO. It features interconnected and non-linear level design, each enemy type and encounter is like a puzzle, and each map is a short resource management challenge that you have to deal with.
God damnnit, was Chu Ishikawa responsible for that game's soundtrack? This is Industrial greatness.
Norikazu Miura, actually. Both games have a great industrial/ambient score. The sequel feels like a step down, though -- it's worth a playthrough, but it feels dumbed down, without the fine details of the original combat system, and also with a two weapon limit and regenerating health/energy/ammo...