The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 600x337 images (15 members)
- Achievement images (15 members)
- Achievements (1 member)
- Articles needing images (2 members)
- Audio recordings (2 members)
- Backer reward items (52 members)
- C.W. (10 members)
- Candidates for deletion (2 members)
- Candidates for speedy deletion (0 members)
- Cells (5 members)
- Chambered images (183 members)
- Character images (46 members)
- Characters (114 members)
- Characters/ru (5 members)
- Citation needed (0 members)
- Cleanup (2 members)
- Community (1 member)
- Content (1 member)
- Content templates (14 members)
- Copyright templates (10 members)
- Cyan art images (3 members)
- Device images (164 members)
- Devices (30 members)
- Disambiguations (0 members)
- Document images (52 members)
- Documentation templates (50 members)
- Documents (34 members)
- Documents/ru (2 members)
- E.E. code images (62 members)
- Earth images (13 members)
- Easter egg images (5 members)
- Easter eggs (9 members)
- Farley (9 members)
- Featured images (34 members)
- Female characters (29 members)
- Formatting templates (20 members)
- Gameplay (11 members)
- Heart images (9 members)
- Help (5 members)
- Hidden categories (2 members)
- Hunrath images (278 members)
- Images (19 members)
- Images needing improvement (0 members)
- Infobox templates (5 members)
- Item images (160 members)
- Items (8 members)
- Kaptar images (61 members)
- Kiosk recordings (6 members)
- Legal notices (3 members)
- Lists (13 members)