The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Ability images (54 members)
- Arcanium Wiki (13 members)
- Artifact images (8 members)
- Artifacts (8 members)
- Candidates for deletion (1 member)
- Candidates for speedy deletion (0 members)
- Citation needed (0 members)
- Class images (6 members)
- Classes (6 members)
- Cleanup (0 members)
- Community (4 members)
- Copyright templates (12 members)
- Disambiguations (0 members)
- Documentation templates (64 members)
- Formatting templates (23 members)
- Gameplay (1 member)
- Guides (2 members)
- Hero images (24 members)
- Heroes (14 members)
- Hidden categories (0 members)
- Images (7 members)
- Images needing improvement (0 members)
- Infobox templates (3 members)
- Legal notices (3 members)
- Media (2 members)
- Minion images (5 members)
- Navigation templates (6 members)
- Notice templates (15 members)
- Pages to be merged (0 members)
- Pages to be moved (0 members)
- Pages with broken file links (0 members)
- Province images (10 members)
- Provinces (11 members)
- Responsive flex templates (9 members)
- Stubs (42 members)
- Template documentation (3 members)
- Templates (17 members)
- Templates with bad documentation (0 members)
- Templates with no documentation (0 members)
- Unattributed files (0 members)
- User groups (13 members)
- Videos (0 members)
- Wiki maintenance (14 members)
- Wiki skin images (5 members)