This is one of best megawads's I've played. I didn't find any bad maps, and they're on the easy side due to large ammount of ammo, health and powerups the author provides. Some maps have more than 500 monsters and can be slaughterish so be warned. I feel there should've more reviews of this megawad for it to be more acknowledged.
It was fun (technically speaking). I was on the train and I had nothing to do. So I fired up this wad and chugged through a couple of these levels. Special thanks to my good friends iddqd and idkfa, they made this experience bearably amusing.
Three levels in three separate WADs (EHD11, EHD12 and EHD14) dated March 31 1994 - 26 years and a day ago. The author, Ed Jankovsky - a student at Northern Arizona University, announced them on the same day in newsgroup alt.games.doom in a thread titled "Try These New Levels!!!"
The number of the exclamation marks in the subject reflected the author's excitement rather than the quality of the levels. Even by the standards of the day they were rather poor - Michael Kelsey's STONES had been out for several days already.
The only noteworthy level in this pack is EHD14. It's a 5x5 grid of empty 256x256 rooms, each with a teleporter in the center. No monsters or exit, this was probably meant to be a DM-only board. All weapons except the shotgun are present, as well as some ammo. There are a couple more rooms extending north from the north-easternmost grid cell, but to proceed you need to raise the bridge across the nukage first. The switch is in the center of the grid. Once you get to the northernmost room the things finally start getting interesting.
You can walk out of the map into the void through the north-eastern corner of that room. Then you can go west and circle the map to your heart's content, provided you keep far enough away from the two nukage sectors. You can even travel in the void between the individual grid cells and examine their contents from outside. Once you drop into the nukage sectors extending out into the void the journey is over, however. The nukage won't harm you and you can get back into the map but you cannot get onto the walkway or back into the void.