WRATH: Aeon of Ruin https://store.steampowered.com/app/1000410/WRATH_Aeon_of_Ruin/
(Multiplayer on the dev roadmap)

Doombringer
https://store.steampowered.com/app/1156120/DOOMBRINGER/

SPRAWL https://store.steampowered.com/app/1549690/SPRAWL/
(planned pvp multiplayer https://steamcommunity.com/app/1549690/discus...191181470/)

Prodeus https://store.steampowered.com/app/964800/Prodeus/
(planed multiplayer https://steamcommunity.com/app/964800/discuss...609068508/)

Necromunda: Hired Gun (looks visually great in the trailer)
https://store.steampowered.com/app/1222370/Necromunda_Hired_Gun/

Nail & Crescent; a Quake 1 inspired total conversion for the Quake 2 RTX engine, with an emphasis on tools and resources for community map/mod making.
Twitter https://twitter.com/nail_crescent
Teaser https://youtu.be/BIOJ6QURT5k
Discord https://discord.gg/9FNqVWCkF6
Media: https://imgur.com/a/ygo8H6k

Dread Templar
https://store.steampowered.com/app/1334730/Dread_Templar/

Turbo Overkill
https://www.youtube.com/watch?v=varoEJiaxjo
https://store.steampowered.com/app/1328350/Turbo_Overkill/

Ion Fury https://store.steampowered.com/app/562860/Ion_Fury/
(Multiplayer mentioned on the last line of the description on Gog https://www.gog.com/game/ion_fury)

Graven (Co-op) https://store.steampowered.com/app/1371690/GRAVEN/

Postal: Brain Damaged https://store.steampowered.com/app/1359980/POSTAL_Brain_Damaged/

Kingpin: Reloaded https://store.steampowered.com/app/1224700/Kingpin_Reloaded/

Anomalous
https://www.youtube.com/watch?v=Mq_l7YaAKAo

DUSK https://store.steampowered.com/app/519860/DUSK/
(game from 2018 with DuskWorld multiplayer)

AMID EVIL https://store.steampowered.com/app/673130/AMID_EVIL/
(game from 2019)

Witchfire https://www.youtube.com/watch?v=-KMaDFKeMRU
(kinda looter shooter https://en.wikipedia.org/wiki/Witchfire_(video_game))

Shadow Warrior 3
https://store.steampowered.com/app/1036890/Shadow_Warrior_3/

Brutal Fate (thanks @Ian215)
https://store.steampowered.com/app/1409460/Brutal_Fate/

HROT (thanks @cloned)
https://store.steampowered.com/app/824600/HROT/

ULTRAKILL
https://store.steampowered.com/app/1229490/ULTRAKILL/

Core Decay (thanks @Niel_1)
https://store.steampowered.com/app/1260940/Core_Decay/

Nightmare Reaper (thanks @Niel_1)
https://store.steampowered.com/app/1051690/Nightmare_Reaper/

Hedon
https://store.steampowered.com/app/1072150/Hedon/

Project Warlock
https://store.steampowered.com/app/893680/Project_Warlock/

Viscerafest (thanks @Niel_1)
https://store.steampowered.com/app/1406780/Viscerafest/

Hellbound
https://store.steampowered.com/app/753590/Hellbound/

Scathe
https://store.steampowered.com/app/1154830/Scathe/

+ Doom 2016/Eternal, Wolfensteins...

It's time for Quake 1 remake ;)