See the original ud.txt NOTE: The author mentions Twisfx.wad that was supposed to be included in the zip, but wasn't found. It is most likely the same Twisfx.wad that is included with Andy Badorek's Twilight Lab WAD (twilab.zip).
Ungrateful Dead Can you blame them if they're a little peeved when, level after level, you constantly slaughter them? This time, however, they're ready for you and they've prepared a quite a few surprises. This level replaces map 01. The action is non-stop so save often because even though I know where everything is, I still can't get through the level without getting killed. Tread carefully! This level is NOT set up for co-op or deathmatch play nor are there different difficulty settings. Just load the unzipped files into your Doom2 directory and type "UD" at the prompt. I've included Twisfx.wad because I think it's one of the better sound replacement sets I've heard... wonderful death throes. Unfortunately, I can't remember where I got it so I can't appropriately offer credit. Whoever you are, thanks. This level took a long time to build. During its creation children were born, people died...in fact, all those things continued to happen during the writing of this sentence. I believe I have squashed all the bugs so if you find any please let me know. Doria 72734,1003