Last, Habitat: Deep Sea Defense

Last Habitat: Deep Sea Defense is a rather unusual tactical strategy of tower defense in which you have to show your tactical skills in an unfamiliar world. And so, the game takes place in the future when the earth is no more suitable places to live, and mankind was forced to build colonies on the seabed, but there were not enough enemies. Your task is to take over the defense of the underwater colony, while not only building defensive towers and structures, but tunneling which will move the enemy.