Select a tower and use it to block your incoming foes. The more towers that you will build the better. You can also sell the weak towers in exchange for stronger towers.

Perform your duty as a frontline soldier. Protect your base and do not allow your opponents to enter. Using your tactical skills, you can build a range of defense towers.

Assume the role of a commander and deploy your special units to fight against your toughest foes. No matter what, do everything that you can to prevent your enemies from attacking your headquarters.