Pack of asteroids bomb Earth. Build turrets and platforms to protect Earth Groups of asteroids appears on different edges of map. Build Bastion turret, rocket turret and laser turret. Each turret has its own specials. Bastion - big mass, big HP. Rocket - extra strong damage, Laser - cheap.
Drag mouse to move screen or click on minimap. Use hotkeys: 1 - Laser; 2 - Rocket; 3 - Bastion; Esc - cancel action