Shadows of the Nightmare Realm (SOTNR.PK3)

Alexa Jones-Gonzales started out making vanilla Doom levels for the publicly-released and then rescinded Kill megaWAD. Later, in 2010, she created One Doomed Marine for the Doomsday engine. With 2016's Extreme Terror YukiRaven appears to have taken to roost in GZDoom since this subsequent minisode (and, looking ahead, the next two) is for the popular GL engine. Shadows of the Nightmare Realm is a four plus one secret level experience for Doom II. It technically has a skill selector intro map, too, bringing up the total to six. The work builds on many of the tropes developed in EXTERROR with room-over-room geometry and colored lighting but SOTNR has a very different feel.

Extreme Terror (EXTERROR.PK3)

EXTREME TERROR
by Alexa "YukiRaven" Jones-Gonzales

Alexa has been making Doom maps since the classic days with the as yet unfinished one-woman megaWAD, Kill. One Doomed Marine's release in 2010 broke from form, a five-level Doomsday minisode that tried to take advantage of its capacity for scripting and dynamic lights. It would be six years and an engine change before her next publication. Released in 2016, Extreme Terror is a MAP01 replacement for GZDoom to be played in Doom II. Like ODM, it also has a custom soundtrack written by the author for this specific occasion. It's a more technologically advanced outing than its older sibling, too, since it makes use of features like room-over-room geometry and slopes. Not to forget GZDoom's own brand of scripting. The one big thing you might not be expecting given all of these niceties - you're strongly advised against (but not expressly forbidden from) jumping. Keep that in mind.

One Doomed Marine (ODM-V1.1.PK3)

Alexa received accolades for her work in GZDoom - Shadows of the Nightmare Realm in 2017 and, more recently, 2018's Umbra of Fate - but she has had a lot of prior practice in Doom editing utilities. Much of it went toward her incomplete one woman megaWAD (Kill) but her advanced source port debut was in the Doomsday engine with One Doomed Marine in 2010. I'm pretty sure that Jaakko's .EXE was my first community port since it was the target for Kaiser's D64: Absolution TC. It looked a bit different back then, though, and the gap between this five map minisode's original release (made for v1.8.6) and the current version of Doomsday (v2.1) has introduced a number of complications in its functionality.