Colony Defenders Tower Defense 2 is an action game that you can play online at school and home free. Your objective after participating in the battle is to defend the mining colony on Xolara by defeating all of the wicked aliens. While you are fighting against the enemy in Colony Defenders Tower Defense 2, you need to gather as many minerals as possible and build up the strong defense turrets. If you'd like to achieve the best result, you should buy the most powerful upgrades. Have fun!