Slightly shorter rambling about more singleplayer mods for a 25 year old game.
The Awesome Stuff:
HUNT: https://lvlworld.com/mod/id:43
Horde: https://www.moddb.com/mods/cz45modbundle/downloads/cz45q3hm-2024-formerly-czq3uacm
Quake Sandbox: https://www.moddb.com/downloads/quake-sandbox-release
Hunter's Moon (Again): https://www.moddb.com/mods/hunters-moon
Sidrial: https://archive.org/details/SidrialTCWin32
Game Over: https://www.moddb.com/mods/game-over-in-machinimation
Chronic ('cuz why not): https://gamebanana.com/mods/490704
Do you actually care about this?
https://www.youtube.com/playlist?list=PLZNEsibju69wAWkJIzKVEm6-h0mZmIBfU
Timestamps:
0:00 Intro
0:36 HUNT
4:29 Horde
5:53 Quake Sandbox
7:00 Hunter's Moon
8:12 Sidrial
10:05 Sidrial...?
12:41 Outro