Alien forces are attempting to steal cows from our barns, and it’s your job to stop them. Build a variety of turrets to destroy the invaders. Research new technologies to improve your military capabilities.

Controls
Click on turrets to upgrade/sell.
Click on turret in build area or press 0-9, – to select a turret to build.
Space to select an air strike.

Hold W while clicking to quick upgrade.
Hold R while clicking to replace.
Hold S while clicking to sell.
Press T to deselect current turret for building.