Sprawling techbase exploration focused dungeon crawl with mostly low intensity combat (though there are a few set piece battles). This map was finished in 2007, but I hadn't released it because it was supposed to be part of a mini-episode that was never finished.
Prayers of Armageddon is a Doom II megawad created by Santtu Pesonen (MFG38). It includes 32 new maps and a hidden bonus map which is only accessible via using cheats. All the levels for the megawad were created entirely by Pesonen.
There was also a remake titled Prayers of Armageddon: Retaliation, and it was released in 2014.
Hanging Gardens is a single-level PK3 for Doom II and the GZDoom source port that came out in August 2011. It was designed by Paul DeBruyne (skillsaw) and uses a music track from Epic Pinball. It's set in a lush, walled garden in the middle of a desert.
Godless Night is a GZDoom episode with the Supercharge gameplay mod built in. It features very light hub elements, loads of (mostly subtle) Castlevania inspiration, and plenty of secrets to find - especially for challenge-enthusiasts.
200 Line Massacre: The Slaughtering is a megawad (full 32 maps + 4 bonus) by @Arsinikk and @NinjaDelphox with the goal of making Vanilla slaughter-like maps under 200 lines. It is the sequel to 100 Line Massacre and also features additional mapping by @scwiba and @finnks13.
3 city maps from a contest with the goal to use a small street area with mirroring windows and continue building a map based on that area. Only three entries made it into the final poll, with MRCK's and Taivo's maps both winning and Devastator's one getting the second place.