Skynet sends waves of attack bots at your base. Build turrets, generators, shields & more on the grid during build phases. Enemies march from the right. Turrets auto-fire. Click turrets for burst fire! Click damaged buildings to repair. Survive as many waves as you can.

BOTTOM BAR = Select a building type, then CLICK a grid cell to place it.
⚡ ENERGY = Generators make it. Everything costs it.