Patch level for MAP31 to solve a solo play problem. The yellow key is not available except in multiplayer mode and therefore you cannot complete the level. This has never been fixed by id Software since the release of Final DOOM in 1996.
Superb firework display of thousands of fireballs seeming in slow motion because of the vastness - mostly avoidable as they land where you were ages ago; but worth playing just to see it. A HUGE square surrounded by tiers with hundreds of imps and a few others, plus a blockhouse you can enter first to collect ammo. Fighting through the hundreds of monsters when you get onto the tiers is another matter, overwhelming at UV. I cheated to finish so at least I could review. Some HOM bugs.
Insanity, with voodoo dolls (see second screenshot). I get the idea of a shooting gallery if that rocks your boat, but 6000 monsters behind railings- as far as the eye can see, FFS! My PC crawled when I looked towards the invuln spheres (someone said 32 k of them and you can't avoid picking up thousands at a time). In the end I cheated with god mode and no-clipping, and waded in among the chaingunners until I got bored.
Simple, clearly a first wad. All on the flat with big, brightly lit, and architecturally implausible rooms. The first map has two rooms, the second map one, and the third map one plus a kind of exit lobby. You can do one of two things - just run past the monsters and finish (I did it in 35 seconds), or have a bit of fun killing the monsters first. No noticable bugs. I hope the author will go on (or went on) to greater things.