Place Towers, Defeat Enemies, Stack UpgradesStrategically place your towers to fend off massive waves of thousands of enemies at once. Every defeated enemy grants resources you can use to endlessly upgrade your towers—more damage, faster shots, greater range. The pressure increases with every wave!Energy & ProductionTowers need power to fire—generate it using massive solar fields and deliver it to your towers via drones. Enemies drop resources that must be processed in various factories to level up your towers. Only a well-balanced supply chain will keep your defense