The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Powerups (5 members)
- Prop (1 member)
- Real-World Articles (1 member)
- Screenshots (57 members)
- Secret Levels (1 member)
- Stubs (11 members)
- Template documentation (46 members)
- Templates (15 members)
- Templates with bad documentation (0 members)
- Templates with no documentation (0 members)
- The Facilities (13 members)
- The Foothills (13 members)
- The Nameless City (9 members)
- Unattributed files (0 members)
- User groups (12 members)
- Videos (0 members)
- Weapon images (11 members)
- Weapons (12 members)
- Wiki maintenance (14 members)
- Wiki skin images (6 members)