Gall Force: Eternal Story is a game that tells an additional tale from the Gall Force: Eternal Story anime series. This game revolves around Rabby, the second-in-command of the space cruiser Star Leaf, having to rescue her six crew mates and also destroy the fortress of the Paranoids.
The game is a vertical scrolling shoot-'em-up where players start by flying over the surface of the planet Terra, dodging and destroying enemies until they reach a set of launchers. Each launcher launches the player's ship into a different section of outer space. Players must then navigate through more shoot-em' up action until at the end, a boss enemy appears. Defeating this boss will release one of the kidnapped crew members from bondage and allow them to rejoin back onto the Star Leaf crew.
Once a crew member is rescued, they can be selected and will transform the Star Leaf, using their unique powers. These powers affect how the Star Leaf fires its' weapons. Players can also collect power-ups such as the crash star, which clears the screen of enemies, the barrier, providing temporary invincibility, and the speed up icon, allowing the Star Fleet to maneuver faster.