/vr/ - Retro Games

>>3293669
Map packs:
>Beyond Belief
>Rubicon Rumble Pack
>Soul of Evil
>Arcane Dimensions
>Func Map Jam 2 (skip the first map though, it's pretty shit compared to the rest)

Single maps:
>Horde of Zendar
>The Marcher Fortress
>Honey
>Backsteingotik
>Metal Monstrosity

Those are my personal favourites, at least. Quaddicted.com is pretty much the go-to site for singleplayer Quake content. They have a comprehensive list of all the maps/mods they host which you can sort by rating and that kind of thing.