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Track 4 is a track from the third Bloons TD game, Bloons Tower Defense 3. It is one of the 8 original tracks in the online version of Bloons TD 3. This track was one of the 4 tracks that were initially unlocked. These 4 tracks had to be beaten to unlock the last 4 tracks. This is the hardest of the first four tracks.
On Easy Difficulty, the player is started out with 650 Money and 100 Lives. On Medium Difficulty, the player is started out with 650 Money and 75 Lives. On Hard Difficulty, the player is started out with 650 Money and 50 Lives. Towers, upgrades, and road items are the least expensive on easy and the most expensive on hard.
- Main article: Track 4 (BTD3)/Strategies
- The MOAB appears to contain rainbow bloons here.
- There was no sound on this track, the cannon will still have it's sound, but once it's upgraded to Missile Launcher, it will not sound also.