The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Affliction Images (29 members)
- Afflictions (21 members)
- Alien (3 members)
- Barotrauma (7 members)
- Barotrauma Wiki (10 members)
- Candidates for deletion (12 members)
- Candidates for speedy deletion (0 members)
- Citation needed (0 members)
- Cleanup (10 members)
- Coelanth images (2 members)
- Community (4 members)
- Content (4 members)
- Copyright templates (10 members)
- Creature images (2 members)
- Creatures (36 members)
- Data tables (3 members)
- Default Submarine Images (10 members)
- Disambiguations (1 member)
- Documentation templates (65 members)
- Ears (1 member)
- Electrical Components (10 members)
- Electrical components (0 members)
- Explosives (9 members)
- Facts (1 member)
- Formatting templates (22 members)
- Game Mechanics (5 members)
- Game Modes (0 members)
- Gamepedia Blocks (3 members)
- Gameplay (0 members)
- Gear (23 members)
- Gear images (3 members)
- Guides (3 members)
- Hats (1 member)
- Help (0 members)
- Images (9 members)
- Images needing improvement (0 members)
- Infobox templates (1 member)
- Installation images (8 members)
- Installations (32 members)
- Instruments (3 members)
- Item images (4 members)
- Items (43 members)
- Jobgear (3 members)
- KO translation (5 members)
- Lacks images (0 members)
- Legacy Images (21 members)
- Legacy articles (9 members)
- Legal notices (3 members)
- Machine images (3 members)
- Main Page templates (3 members)