37 minutes ago
Fortress of Mystery can be quite fun. I started the level with only 5% health and minimal amo, but was able run around enough to avoid getting hit. This encouraged infighting and I was able to pick off the monsters one at a time.
The teleport puzzles in Unholy Cathedral are annoying, but once I got used to the level there was much to enjoy.
Gateway to Limbo is a bit frustrating, but it is different enough from other levels to make it a unique experience.
E2M6, Halls of the Damned, gets my vote for the worst level in Doom 1 because of having to fight a horde of monsters in a large dark maze where you can't see anything. Much of the level doesn't seem to serve any purpose except to make you fight enemies. It can be tricky to get all the secrets because one room will lock you out, or even crush you, if you don't do it correctly.
E4M1, Hell Beneath, deserves honorable mention because it might be the most difficult level to complete in Doom 1. You have insufficient amo to fight all the monsters. If you don't find the secret room with the rocket launcher then it is hopeless. Monsters will teleport right next to you and kill you. Even the difficulty "I'm too Young to Die" is hard to survive. Using Chocolate Doom, there is a bug where you can get permanently trapped in the Red Key area. Despite doing everything I am supposed to, I only get 50% of the secrets. Also, there is a switch that seems to do nothing.
However, I think that Hell Beneath is fun. There is a walkthrough on YouTube that shows a trick to kill the 4 or 5 Barons of Hell. If you know what you are doing, then you can make it through the level, although maybe just barely.
