The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- OUAT (5 members)
- OathWielders (88 members)
- Operation Verdant Pyramid (12 members)
- Organization (24 members)
- Osugbo (43 members)
- Pages with broken file links (6 members)
- Pages with script errors (1 member)
- Painted Sands of Pteris (2 members)
- Pirates of Quelmar (2 members)
- Planes (29 members)
- Player Characters (511 members)
- Prehistory (1 member)
- Pteris (82 members)
- Pteris Cities (26 members)
- Qandela Obscura (24 members)
- Queljammer (6 members)
- Quelmar Goes To Space (8 members)
- Quelmar Races (23 members)
- Races (77 members)
- Realmtrotter's Guide (20 members)
- Reckondary Characters (5 members)
- Rule Benders (1 member)
- SUPERZ (16 members)
- Scribunto modules with errors (4 members)
- Secondary Characters (19 members)
- Ships (1 member)
- Sick of this Shit (66 members)
- Snobbite (1 member)
- SotS Inc (53 members)
- System Agnostic (36 members)
- Tails of Quelmar (3 members)
- Tales of Quelmar (15 members)
- Teatime Adventures (3 members)
- Tempest Brothers Expeditionary Company (14 members)
- Tempests Brothers Expeditionary Company (1 member)
- Template documentation (30 members)
- Templates (26 members)
- The BackHalls (50 members)
- The Court of Bloom and Blade (12 members)
- The Iron Sea (1 member)
- The Neighbours (19 members)
- The Paragon Protocol (16 members)
- The Rocklin Clinic Job (1 member)
- The Underdungeon (42 members)
- The War of Many Names (2 members)
- Townson Tabletop (4 members)
- Towson Tabletop (238 members)
- Troubles in Alanya (1 member)
- Uncharted (1 member)
- Undead (8 members)