The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Achievement icons (87 members)
- Achievements (92 members)
- Bosses (1 member)
- Candidates for deletion (1 member)
- Candidates for speedy deletion (0 members)
- Characters (7 members)
- Citation needed (0 members)
- Cleanup (0 members)
- Community (4 members)
- Copyright templates (13 members)
- Developers (1 member)
- Dimensions (1 member)
- Disambiguations (40 members)
- Documentation templates (45 members)
- Enemies (2 members)
- Episodes (5 members)
- Formatting templates (22 members)
- Images (4 members)
- Images needing improvement (0 members)
- Infobox templates (1 member)
- Item icons (80 members)
- Items (282 members)
- Legal notices (3 members)
- Media (2 members)
- Mobs (4 members)
- Mods (1 member)
- Notice templates (13 members)
- Pages to be merged (0 members)
- Pages to be moved (0 members)
- Pages with broken file links (197 members)
- Patches (15 members)
- Screenshots (27 members)
- Stubs (282 members)
- Templates (12 members)
- Templates with bad documentation (0 members)
- Templates with no documentation (0 members)
- The Madness of Little Emma (12 members)
- The Madness of Little Emma Wiki (6 members)
- Unattributed files (0 members)
- User groups (12 members)
- Videos (0 members)
- Wiki maintenance (13 members)
- Wiki skin images (3 members)