The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Animals (1 member)
- Candidates for deletion (1 member)
- Candidates for speedy deletion (0 members)
- Citation needed (0 members)
- Cleanup (0 members)
- Community (4 members)
- Copyright templates (12 members)
- Crafting (1 member)
- Disambiguations (0 members)
- Documentation templates (3 members)
- Food (2 members)
- Formatting templates (20 members)
- Front page sections (3 members)
- Guides (0 members)
- Hidden categories (10 members)
- Icons (58 members)
- Images (8 members)
- Images needing improvement (0 members)
- Infobox templates (4 members)
- Items (10 members)
- Legal notices (3 members)
- Matlist templates (12 members)
- Media (3 members)
- Navigation templates (3 members)
- Notice templates (13 members)
- Objects (2 members)
- On My Own (61 members)
- On My Own Wiki (57 members)
- Pages to be merged (0 members)
- Pages to be moved (0 members)
- Pages with broken file links (3 members)
- Placeable (2 members)
- Screenshots (11 members)
- Steam achievement icons (12 members)
- Stubs (4 members)
- Template documentation (50 members)
- Templates (18 members)
- Templates with bad documentation (0 members)
- Templates with no documentation (0 members)
- Unattributed files (0 members)
- Update notes (13 members)
- User groups (12 members)
- Videos (0 members)
- Wiki maintenance (13 members)
- Wiki skin images (3 members)