Defend the lands of these ninjas from enemy samurais, whose thirst for conquest will unleash a dark and terrible power.
Stop their attack in normal mode, and get ready to hold "the horde" later in survival mode.
Advance levels, unlock achievements and buy upgrades to win.
Mouse only. Drop the towers over the construction sites to build them. Drop ninjas over the ground to deploy them, and use their banner to move them when needed.