
Unique fusion of a top-down shooter and tower defense strategy. You are the invader! Use destructive weapons or lead your enemies into a maze of towers. Strategize in the build mode by carefully selecting various types of alien towers or throw yourself right into the heat of the battle.

Finish the single player campaign.

Finish the co-op campaign.

Destroy the airbase headquarters during the Hawaii mission before the reinforcements are called in.

Destroy the convoy with military resources during the mission in the USA.

Build all types of towers in one mission.

Start a mission with your ship fully upgraded.

Finish one optional mission.

Finish all optional missions.