Bloon Dunes (BMC)

In Bloons Monkey City, Bloon Dunes is an area in which players can set up a second city (provided their original city in Grassy Pass is Level 15+). It has many more Desert Terrain tiles than Grassy Pass does, and it has some new terrains including the Badlands Terrain, High Desert Terrain, and Arid Grassland Terrain. There are also new special missions. And most importantly, achieving a city of Level 5 in Bloon Dunes is required for unlocking the Monkey Engineer. Also, bloon waves become harder as more difficult types appear earlier than in Grassy Pass.