Track 6 is a track from Bloons Tower Defense 3. It is one of the 8 original tracks in the online version of the game. This track was one of the 4 tracks that were initially locked.
It seems to be inside a human muscle, with blood flowing around the track.
- Main article: Track 6 (BTD3)/Strategies
- It doesn't contain water, but it may contain blood in the middle of the path.