This is a great map for its time - slaugherish at times but can be managed by a decent player. I dislike the mandatory health/ammo pickups and the paltry armour availability (only a mega armour that I found). I also can't stand the replacement sounds but I suppose one must keep in mind that it came from the early mapping community.
This set is very well designed, very much in homage to the original. I like the progression. The secrets are kind of gimicky and overdone, even when compared to the secret-within-secret s of the original. Otherwise, this is well with a download for anyone who enjoyed Doom 1.
Very fun to play. I can't say enough about the gameplay and the intricate level design. There are A few cosmetic issues with the presentation:
1. The installation does an iwad merge, so if you are running it in a source port, you may want to run eternal.wad through slade or something to remove the duplicated iwad graphics.
2. Most of the replacement sound effect replacements sound worse than the originals.
3. The sprite and fireball replacements for the Imp are very ugly.
Playing the first couple of minutes, I thought I was getting into one of those boring slaughterfest WADs. I stuck with it and found out that there is some really good game play here. Good designs. A bit heavy on some of the powerups (rockets come to mind) but really fun to play. 5 stars.