The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Achievement images (59 members)
- Achievements (69 members)
- Candidates for deletion (0 members)
- Chaos Marines (1 member)
- Chaos Space Marines (6 members)
- Classes (27 members)
- Community (4 members)
- Content templates (1 member)
- Copyright templates (10 members)
- Developers (1 member)
- Documentation templates (12 members)
- Eldar (5 members)
- Eldars (1 member)
- Factions (22 members)
- Formatting templates (23 members)
- Images (48 members)
- Infobox templates (1 member)
- Legal notices (3 members)
- Lore (16 members)
- News (1 member)
- Notice templates (10 members)
- Orkz (5 members)
- Pages with broken file links (0 members)
- Screenshots (28 members)
- Space Marines (5 members)
- Stubs (0 members)
- Templates (17 members)
- Templates with bad documentation (0 members)
- Templates with no documentation (0 members)
- User groups (8 members)
- Vehicles (6 members)
- Warhammer 40k: Eternal Crusade (1 member)
- Warhammer 40k Eternal Crusade Wiki (23 members)
- Weapons (22 members)
- Wiki maintenance (4 members)
- Wiki skin images (14 members)