Atop the enemy formation are four large aliens known as the "Boss Galaga", which take two shots to destroy. These aliens can use a tractor beam to capture the player's ship, returning with it to the top of the formation and costing the player a life. Should additional lives remain, the player has an opportunity to shoot down the Boss Galaga holding the captured ship. Shooting it down as it dives towards the player will result in the captured ship being rescued, and it will join the player's ship, transforming it into a "dual-fighter" with additional firepower and a larger hitbox. However, destroying a Boss Galaga with a captured ship while it is in formation will instead cause the fighter to turn against the player and act as an alien.