Under Defeat is a vertically scrolling shooter where you control a helicopter capable of moving in eight directions. It's a sleek, streamlined experience with just two buttons—fire and bomb—making it easy to pick up but hard to master. What sets the game apart is the tilt mechanic: as you turn, your shots tilt slightly left or right, allowing for strategic, angled attacks. You also have a small, satellite-like option unit that shoots independently. However, charging it requires you to release the fire button for a while, creating a tactical ebb and flow rarely seen in this all-out shoot 'em up genre.