The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Airship (7 members)
- Article (15 members)
- Article management templates (4 members)
- Article stubs (45 members)
- Awards (1 member)
- BlogListingPage (0 members)
- Blog posts (1 member)
- Browse (4 members)
- CC-BY-SA files (2 members)
- CC-BY files (1 member)
- Candidates for deletion (0 members)
- Candidates for speedy deletion (0 members)
- Category templates (3 members)
- Character Background (3 members)
- Community (4 members)
- Content (1 member)
- Copyright (0 members)
- Disambiguations (0 members)
- Encyclopedia (26 members)
- Files (2 members)
- Forums (7 members)
- General wiki templates (31 members)
- Help (5 members)
- Help desk (2 members)
- Hidden categories (2 members)
- History (15 members)
- Image wiki templates (9 members)
- Images (4 members)
- Infobox templates (9 members)
- Location (20 members)
- New pages (0 members)
- Organisation (0 members)
- Organization (23 members)
- Pages proposed for deletion (0 members)
- Pages with broken file links (0 members)
- Personalities (55 members)
- Policy (2 members)
- Site administration (14 members)
- Site maintenance (5 members)
- Template documentation (59 members)
- Templates (11 members)
- Vehicles (8 members)
- Videos (0 members)
- Watercooler (2 members)