From the attack on Jaburo to the final stand at A Baoa Qu Spirits of Zeon follows two Principality soldiers, Kurt and Robin, also known as the two Ogres, in their fight to survive. Players shoot their way through eight sequential stages starting in Jaburo, through the escape into space, the defense of Solomon, and lastly to the last outpost of Zeon. At the end of their path lies a duel with the White Devil, and hero of the One Year War, Amuro Ray. Stages are completed by shooting everything in your path until reaching a boss fight. In addition to the Zaku II's assault rifle the mobile suit is also equipped with a Heat Axe to attack nearby enemies, a high damage limited-ammunition bazooka that can blow apart shielded enemies, and a limited-ammunition mine that hits every enemy onscreen and can be thrown while ducking. Raising the gun vertically ducks, reloading the gun and avoiding marked enemy fire and melee range attacks. Additional health and ammunition are contained a item creates, and bonus points can be gained by shooting difficult to hit targets or completing secret objectives. Some stages also come with optional objectives, such as defending Solomon from a missile barrage or shooting down more targets than Char. A wide range of rare Federation technology make boss-fight appearances in the game, including a squad of RX-79, the Full Armor 78-1, and the first game appearance of the RGM Striker.
