Artman2004

A Disney MMO from the 2000s.

Grappling Hook from 2009, a first-person puzzle-platformer. I don't know if it counts as a shooter, but what the hell. The reviews for it often compare it to Portal. https://ghook.speedrungames.com/

Reading the Doom Awards, I felt like I was reading a grocery list instead of a celebration of talented modders. The MyHouse entry, for example, feels so hollow, quickly listing off its praises rather than explain them in detail. Knowing that it's AI, I'm not surprised.

Toontown?

I got a random child with a Santa hat!

Stuck on Phobos yet again...

Abuse (1996), a side-scroller shooter where you fight not-xenomorphs in a prison filled with deadly traps.

Doomed Again was a highly ambitious remake of Doom for the sourceport EDGE, using janky 3D models and promising a boatload of new features. The website was last updated in December 2009. Footage still exists of this mod. And its website can be found on the Wayback Machine:https://web.archive.org/web/20201016225401/https://sites.google.com/site/doomedagain/da_home In a similar vein, Doom: The Resurrection was a so-called "extension of the Doom universe" using the Doomsday engine. The only remnant of this mod is its ModDB page, showcasing a bunch of weapon models:https://www.moddb.com/mods/doom-the-resurrection

Gothic lady.

Red Planet: A top-down shooter set on a red planet where you shoot aliens. Also Rick Astley references. Ectology: A semi-realistic take on ghost hunting. You catch ghosts at various locations before the sun comes up. You do this with an "ectotron" which you have to time in order to catch the ghost, otherwise you kill the ghost. Planet Wars: You are a space marine and you shoot headcrabs and mini-gonarchs. I love this game for its weapon customization.

TECNO: The Base, a 2008 game where you shoot robots, solve puzzles, use mechs, and other stuff.

AlienX, a web game from 2001.

Although she never had an account here (from what I can tell), ItsMeVeronica, creator of the Isabelle and Deltarune companion mods seems to have just completely gone silent.

Dark Earth, a post-apocalyptic fantasy game from 1997.

An FPS game set in the Matrix universe. You could also set it during the Machine War. A game where you play as a "space janitor" that must clean up a deadly alien biomass using various tools such as flamethrowers and acid grenades.