Bloon Dunes is the second map zone the player will be able to access in Bloons 2. It must be unlocked in order to be explored which can be done by completing the Popping Fields zone. All levels can be unlocked by buying the Unlock All Levels upgrade in the map page. Purchasing the upgrade also unlocks the Bloons 2 Level Editor.
There are 12 levels in Bloon Dunes, numbered 13-24: