Threshold of Pain is a ZDoom episode which attempts to recreate the look and feel of Midway's famous PSX conversion of Doom whilst maintaining the core elements of the PC versions and a level of difficulty PC players would expect.
Skycity uses new textures, graphics and new sounds for the weapons. The level is set in a sort of abandoned megastructure, similar to a large shopping mall made out of concrete and marble. Spiderwebs and noticeable signs can be found all around. The map design is complex and intricate, with several interconnected areas and pathways that the player can choose, which encourages exploration due to the non-linearity of the map, and all the hidden and secret spots that can be found. It is a very early example of a semi-realistic map trying to recreate an urban-like structure.
Sillouhettes of Phobos (a misspelling of Silhouettes of Phobos) is an Ultimate Doom replacement mod of four levels, created by Michael Lundy and released in November 1995. It consists of four spacious levels, the first three replacing the respective maps from Knee-Deep in the Dead, and the last bonus map taking up the E4M1 slot.
Run Buddy, stylized as "run buddy", is a single map for Boom by Michael Krause released in April 1998. Its notability is in the large scale of its architecture and liberal use of open spaces, which contributed to slowdown issues due to reject inefficiencies. A "fast" version using RMB to calculate the reject was released in May 1998.
Post is a Doom II episode replacement mod of eleven levels, created by Tony Sideris in 1996. It was a sequel to his Doom episode replacement Debut from earlier in 1996.
A totally non-linear level, other than needing all three keys to exit, you're free to go anywhere you want. Play on HMP for a Doom-like experience, UV adds the Doom 2 monsters, NTR is real easy. Clear all otherworldly mutants, secure the base, and live to tell another tale.
It looks to be inspired by Christian Hansen's 'Flay the Obscene 3', but it's actually based on the look planned for 'The Anomaly: Part III. The layout of the map is done in such a way that you can actually go anywhere you want to and chose a route that you feel best. Some routes make the level more hard and some routes make it easier.
Pax is a single-level PWAD for Doom II and a Boom-compatible source port. It was released by Ty Halderman in 1999 and uses an unnamed music track by Peter Cowderoy.
This map is heavily inspired by Episode 4 of The Ultimate Doom, especially E4M1 and E4M6. It was originally made for a project called The Ninth Gate that never saw the light of day.
Orange is True Love is a three-level Doom II PWAD for Boom-compatible source ports. A precursor to the Wormwood series, it represents the first in a series of Halloween-themed collaborations between Zachary Stephens (Ribbiks) and Grain of Salt and was released on October 31, 2018. The WAD features a prominent orange color theme and consists of two short but challenging opening maps and a more extensive, medium-length finale.
Oceanside is a three-map Doom II WAD for limit removing source ports created by Michael Jan Krizik (valkiriforce), which he has stated is one of his most personal projects. It is inspired by nostalgic memories of his hometown of Oceanside, California and features several recreations of real-life locations, including his childhood home.
Nostromo's Run takes place in an isolated station aboard some alien planet. The base was used for fighter training and mutant entertainment and features a large arena. Humans were being brought to this pleasure ground for the mutants amusement.