The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Blog posts (3 members)
- Bloons (1 member)
- Browse (3 members)
- Candidates for deletion (0 members)
- Characters (1 member)
- Disambiguations (0 members)
- Glitches (4 members)
- Help (0 members)
- Images (0 members)
- Leader Board (1 member)
- Leaderboard (2 members)
- Leaderboards (1 member)
- Lists (2 members)
- Mechanics (12 members)
- Missions (2 members)
- Pages with broken file links (30 members)
- Records (1 member)
- Spoiler (1 member)
- Stubs (4 members)
- Template documentation (2 members)
- Templates (0 members)
- Towers (27 members)
- Tracks (4 members)
- Trivia (2 members)
- Videos (3 members)
- World Records (1 member)