In a world that is over run by monsters and other terrible creatures nobody's paths are safe. Your paths are overrun and are in threat of letting monsters steal away your lives! Place turrets along the path in order to stop the monsters before they can complete their circuit. Use strategy to determine what turrets to place and where. After turrets are place you can either upgrade them to do more damage, or sell them to buy stronger ones, or just to get the same one placed elsewhere. Make sure to be on your toes and think quickly as the monsters get tougher and tougher and will stop at nothing until they have stolen each and every one of your lives.