Qmaster has dug up and released five old(er) maps he made in 2008-2016:
https://www.quaddicted.com/reviews/sotf1.html
A very small level based on E4M3, mostly populated by fiends.
https://www.quaddicted.com/reviews/screenshots/sotf1_thumb.jpg
https://www.quaddicted.com/reviews/scot2.html
A very small ruined cathedral with a graveyard and arena combat based off a Scottish castle seen in some magazine.
https://www.quaddicted.com/reviews/screenshots/scot2_thumb.jpg
https://www.quaddicted.com/reviews/rin1m1.html
Small level based on E4M4: The Ebon Fortress, originally made for some abandoned mod.
https://www.quaddicted.com/reviews/screenshots/rin1m1_thumb.jpg
https://www.quaddicted.com/reviews/limbo2.html
Medium-sized “hipmetal” level for Quake Mission Pack No. 1 - Scourge of Armagon, featuring lightning gun combat against Vores and Scourges.
https://www.quaddicted.com/reviews/screenshots/limbo2_thumb.jpg
https://www.quaddicted.com/reviews/tbg1.html
Medium-sized green metal map with lightning gun-focused combat.
https://www.quaddicted.com/reviews/screenshots/tbg1_thumb.jpg
And there’s a new map by xlarve called https://www.quaddicted.com/reviews/xld.html
A large metal/runic/mixed-texture dungeon with relentless arena combat in small rooms and tight corridors, 500+ monsters in total. “For experienced players”!
https://www.quaddicted.com/reviews/screenshots/xld_thumb.jpg