The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Advanced (3 members)
- Black Market (21 members)
- Black Market images (20 members)
- Building images (34 members)
- Buildings (25 members)
- Candidates for deletion (16 members)
- Candidates for speedy deletion (0 members)
- Citation needed (0 members)
- Cleanup (0 members)
- Community (5 members)
- Concept art (9 members)
- Content (2 members)
- Copyright templates (10 members)
- Disambiguations (0 members)
- Documentation templates (52 members)
- Faction images (8 members)
- Formatting templates (21 members)
- Gamepedia Blocks (3 members)
- HQs (6 members)
- Icon templates (1 member)
- Images (18 members)
- Images needing improvement (0 members)
- Infobox templates (6 members)
- Legal notices (3 members)
- Mechanics (5 members)
- Media (4 members)
- Navigation templates (5 members)
- Notice templates (13 members)
- Offworld Trading Company (14 members)
- Offworld Trading Company Wiki (7 members)
- Pages to be merged (0 members)
- Pages to be moved (0 members)
- Pages with broken file links (5 members)
- Patent images (18 members)
- Patents (18 members)
- Resource images (45 members)
- Resources (15 members)
- Screenshots (4 members)
- Settings (1 member)
- Stubs (2 members)
- Template images (0 members)
- Templates (21 members)
- Templates with bad documentation (0 members)
- Templates with no documentation (0 members)
- Terrain images (9 members)
- Unattributed files (3 members)
- User groups (14 members)
- Videos (0 members)
- Wiki maintenance (12 members)
- Wiki skin images (6 members)