Fiendish.WAD

There's definitely some ideas put into use here, but the result is rather sloppy. You start off with three teleporters in the first room, so going in blindly, I couldn't tell if I had to take one teleporter first or if I can complete the level in (almost) any order. To sum it up, you have to go through these teleporters in a linear order to complete the level, otherwise you'll be greeted by locked doors that serve as a reminder that you're going the wrong way. The level itself isn't overly confusing, but coming in the gauntlet room unprepared left a sour impression.

The majority of rooms are spacious and not very pleasing to look at. You'll see big open rooms with dirt and marble textures placed throughout, and aside of the pentagram room with Spectres and an Arch-Vile at the center, the map just boils down to dull rooms and hallways you can run past through. With good use of powerups, you can get by most threats without an issue. There's some bits of carnage, but the overall gameplay feels plain.

A little heads up, but when playing on a ZDoom port, the teleporters at the start of each area will teleport you to a random destination. That is because their lines are zero-tagged teleport actions, meaning they will teleport you to any destination placed on a zero-tagged sector. This can make the level more confusing to complete as you may end up in an area you aren't supposed to be at. When playing in vanilla, these teleporters will always teleport you to the start of the level.