Tunnels/Strategies

Tunnels is an Expert track in which the bloons enter the tunnels that the monkeys can't pop in it, but MOABs can easily damaged because they stay afloat like the Monkey lane's tunnels.

Tips

 * Dart Monkeys (4/2 upgrade) are considered effective in the track due to some straight lines seen on it.
 * Ice Towers (in 4/2 or 2/4 upgrade) are useful in this track especially when the bloons reached the next tunnel.
 * Keep in mind that this track is quite long although about half of it is covered; thus Spike Factories are quite essential for this track.