Sudden Death - You’ll be tasked with simply surviving as long as possible as a vicious onslaught of enemies appear. Strategy!? Wall off the enemies with Gatling Towers as efficiently as possible, then gradually introduce greater firepower as the invading armies grow larger.
Puzzle Maps - In these maps, you’ll only have a limited amount of money with which to steer enemy units towards a predetermined point.
Time Trial - At these you’ll be tasked with killing a certain number of troops within a fixed amount of time. Go for raw firepower here and upgrade your artillery units as quickly as possible.