The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- AI (35 members)
- Advanced Cannons (4 members)
- CRAM Cannons (8 members)
- Campaign (5 members)
- Candidates for deletion (3 members)
- Candidates for speedy deletion (0 members)
- Citation needed (2 members)
- Cleanup (2 members)
- Community (4 members)
- Component Image Correction Needed (17 members)
- Component Image Needed (40 members)
- Components (195 members)
- Construction (8 members)
- Constructs (19 members)
- Control (33 members)
- Copyright templates (10 members)
- Deepwater Guard (8 members)
- Deepwater Guard Vessels (20 members)
- Default Prefabs (8 members)
- Defences (35 members)
- Disambiguations (4 members)
- Documentation templates (3 members)
- Domains (3 members)
- Engines (2 members)
- Factions (18 members)
- Featured images (8 members)
- Formatting templates (24 members)
- From the Depths (14 members)
- From the Depths Wiki (9 members)
- Front page sections (4 members)
- Fuel Engines (25 members)
- Gray Talons (4 members)
- Gray Talons Vessels (3 members)
- Guides (6 members)
- Hidden categories (2 members)
- Icons (154 members)
- Illustration Images (5 members)
- Image Needed (6 members)
- Images (7 members)
- Images needing improvement (0 members)
- Infobox templates (6 members)
- Lasers (6 members)
- Legal notices (3 members)
- Lightning Hoods (5 members)
- Lightning Hoods Vessels (3 members)
- Loading Screens (12 members)
- Lore (17 members)
- Lua (3 members)
- Media (1 member)
- Misc (35 members)