The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Achievement images (20 members)
- Achivements (1 member)
- Candidates for deletion (2 members)
- Candidates for speedy deletion (0 members)
- Character images (6 members)
- Characters (11 members)
- Citation needed (0 members)
- Cleanup (0 members)
- Community (4 members)
- Contents (2 members)
- Copyright templates (13 members)
- Disambiguations (0 members)
- Documentation templates (3 members)
- Firewatch (12 members)
- Formatting templates (20 members)
- Gamepedia Blocks (3 members)
- Guide (12 members)
- Help (1 member)
- Images (6 members)
- Images needing improvement (0 members)
- Infobox templates (0 members)
- Legal notices (3 members)
- Location images (45 members)
- Locations (26 members)
- Media (18 members)
- Notice templates (11 members)
- Object images (115 members)
- Objects (106 members)
- Pages with broken file links (2 members)
- Standard Deploy (1 member)
- Stubs (0 members)
- Template documentation (8 members)
- Templates (19 members)
- Templates with bad documentation (0 members)
- Templates with no documentation (0 members)
- Textures (1 member)
- Trophies (1 member)
- User groups (12 members)
- Voice actor images (5 members)
- Voice actors (6 members)
- Wiki (14 members)
- Wiki maintenance (9 members)
- Wiki skin images (3 members)