The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Administrator Support Requested: Rename Media (2 members)
- Admirals (24 members)
- Adro system (3 members)
- Anderson Station (3 members)
- Appearance templates (7 members)
- Arcadia system (3 members)
- Art (8 members)
- Article management tags (2 members)
- Article management templates (14 members)
- Article stubs (194 members)
- Articles in need of citation (22 members)
- Articles needing citations (22 members)
- Articles to clean up (3 members)
- Arts and Entertainment (17 members)
- Asteroids (24 members)
- Asylum system (3 members)
- Athens system (3 members)
- Auberon (23 members)
- Authors (3 members)
- BTS Video (1 member)
- BTS images (9 members)
- Bara Gaon (9 members)
- Bars and Restaurants (13 members)
- Battleship (32 members)
- Battleship classes (9 members)
- Battleships (5 members)
- Behind the scenes (5 members)
- Belt (32 members)
- Belter language (8 members)
- Belter phrases (41 members)
- Belter words (438 members)
- Belters (233 members)
- BlogListingPage (0 members)
- Blog posts (61 members)
- Books (8 members)
- Browse (5 members)
- Candidate for deletion (74 members)
- Candidates for deletion (5 members)
- Candidates for speedy deletion (0 members)
- Captains (19 members)
- Cast (357 members)
- Cast Images (183 members)
- Castila system (3 members)
- Category templates (3 members)
- Ceres (88 members)
- Chapters templates (9 members)
- Character Images (39 members)
- Characters (774 members)
- Characters (Books) (376 members)
- Characters (TV) (391 members)