The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Animals (2 members)
- Battles (2 members)
- Building buttons (3 members)
- Building icons (40 members)
- Building images (320 members)
- Building sprites (23 members)
- Buildings (1 member)
- Buildings list (82 members)
- Candidates for deletion (7 members)
- Candidates for speedy deletion (0 members)
- Cataphract (0 members)
- Cavalry (5 members)
- Citation needed (0 members)
- Cleanup (1 member)
- Combat (2 members)
- Community (4 members)
- Concept art (9 members)
- Content templates (3 members)
- Copyright templates (12 members)
- Culture (2 members)
- DE translation (2 members)
- DE translations (1 member)
- Democracy (1 member)
- Diplomacy (6 members)
- Disabled Content (1 member)
- Disambiguations (0 members)
- Documentation templates (3 members)
- Economics (8 members)
- Equipment (0 members)
- Events (1 member)
- Formations (3 members)
- Formatting templates (20 members)
- Front page sections (14 members)
- Game concepts (23 members)
- Game servers (1 member)
- Growth (1 member)
- Guides (14 members)
- Hidden categories (0 members)
- Housing (1 member)
- Icons (69 members)
- Images (9 members)
- Images needing improvement (0 members)
- Infantry (4 members)
- Infobox templates (9 members)
- Infoboxes (1 member)
- Infoboxes lacking images (0 members)
- Infrastructure (5 members)
- Knowledge (207 members)
- Knowledge (Agriculture) (15 members)
- Knowledge (Construction) (42 members)