The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Standard Delegate type (5 members)
- Stub (0 members)
- Stubs (1,382 members)
- Survey (4 members)
- SyncDelegate Missing Description (0 members)
- Technical article (1 member)
- Templates with inlined CSS (1 member)
- Tool images (29 members)
- Tools (26 members)
- Tools:CommunityTools (0 members)
- Triggers (2 members)
- Trophy images (63 members)
- Troubleshooting (27 members)
- Troubleshooting/de (1 member)
- Troubleshooting/en (15 members)
- Troubleshooting/fr (11 members)
- Troubleshooting/gur (1 member)
- Troubleshooting/ja (14 members)
- Troubleshooting/ko (1 member)
- Troubleshooting/zh-cn (1 member)
- Tutorial (16 members)
- Tutorial/en (1 member)
- Tutorial/fr (1 member)
- Tutorial/ja (1 member)
- Tutorial:Avatar (2 members)
- Tutorial Worlds (1 member)
- Tutorials (0 members)
- Type (287 members)
- Type:Value (0 members)
- Type Color (2 members)
- Unofficial Event (0 members)
- Unofficial events (4 members)
- Unsupported Features (1 member)
- Unsupported way (3 members)
- User Creations (0 members)
- User Interface (4 members)
- User images (32 members)
- Userboxes (18 members)
- VR Device (1 member)
- Value Types (0 members)
- Value types (53 members)
- Versions (207 members)
- Versions/de (0 members)
- Versions/en (0 members)
- Versions/fr (0 members)
- Versions/ja (0 members)
- Videos (4 members)
- Wiki maintenance (3 members)
- World (16 members)
- World images (562 members)