The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Air vehicles (6 members)
- Articles with upcoming content (7 members)
- Brotherhood of Nod (3 members)
- Building images (3 members)
- Buildings (2 members)
- Candidates for deletion (1 member)
- Candidates for speedy deletion (0 members)
- Characters (2 members)
- Citation needed (1 member)
- Cleanup (0 members)
- Command & Conquer maps (16 members)
- Community (4 members)
- Content templates (1 member)
- Contents (3 members)
- Copyright templates (11 members)
- Defense buildings (2 members)
- Development (1 member)
- Disambiguations (1 member)
- Documentation templates (6 members)
- Exclude in print (1 member)
- Factions (4 members)
- Firestorm (3 members)
- Firestorm air vehicles (2 members)
- Firestorm ground vehicles (4 members)
- Firestorm images (1 member)
- Firestorm primary weapons (0 members)
- Firestorm vehicles (2 members)
- Firestorm weapons (1 member)
- Formatting templates (19 members)
- GDI buildings (12 members)
- GDI characters (1 member)
- GDI vehicles (19 members)
- Game Modes (0 members)
- Game modes (3 members)
- Gamepedia Blocks (3 members)
- Gameplay (9 members)
- Games (3 members)
- Global Defense Initiative (4 members)
- Ground vehicles (14 members)
- Guide (1 member)
- Help (1 member)
- Images (4 members)
- Images needing improvement (0 members)
- Infobox templates (9 members)
- Legal notices (3 members)
- Link templates (4 members)
- Loadouts (0 members)
- Main buildings (11 members)
- Maps (1 member)
- Meta templates (4 members)