Bulsajo Duck

Bulsajo Duck is a Korean shmupset in a futuristic world where Earth has been invaded by an alien race known as the Duck tribe. A faction of the invaders joins forces with humanity to establish the Earth Defense Force. Players take the role of a duck soldier fighting against the hostile alien forces in an effort to repel the invasion.

The game uses one-hit deaths, making precise movement and positioning essential. Defeated enemies leave behind power-ups that improve the player's weapons, increasing offensive capabilities as the game progresses. Each stage culminates in a large boss battle that must be overcome before advancing to the next area.