Welcome to the United Era of Earth! When the home planet fell, humanity looked up, not down. The Moon became the new frontier. By Year 97, struggle gave way to discovery. In the grand Oxygen Complex, a marvel of engineering hums at the core: a machine powered by Element 115, capable of twisting lunar physics to recreate Earth like gravity. Under its pull, explorers gather not for survival but for thrill. The impossible is now real, a roller coaster soaring through Earth like gravity high above the Moon's surface.