In the year 2118, the Earth has been invaded by an hostile alien called "Dractors" (ドラクターズ, Dorakutāzu), killing 99.9% of humanity during what would later be referred to as "The Day of Destruction" (滅亡の日, Metsubō no hi), as the surviving 1% of humanity are placed in fortified Shelters (シェルター, Sherutā) and have their memories of the invasion repressed via its memory manipulation technology, allowing them to live in peace while the unified world government and its forces fight back against the Draktors.
Yamato Ichidaiji, a hot-blooded and psychopathic teenager who has recently begun to experience flashbacks of the Draktor's invasion and the death of his family, is chosen to be one of the pilots for the newly developed Megaton-Class Rogues along with other chosen teens: Teru Asami, a calm, yet narcissistic teen with ties to the unified government; Ryugo Hijikata, a brawl-happy delinquent; Reiji Amemiya, a cat-loving pacifist; and Jun Kirishima, a feisty and talented girl.
To protect humanity and turn the tide of war against the Draktors, the united world government built armored bipedal machines called Rogues, which are designed to be mass-produced and are used as cannon fodder for their more advanced successors.
Some time later, development on a series of next-generation Rogues aboard the Shelter Ixia was finished and later dubbed Megaton-Class Rogues, which are more powerful and durable due to being made from Megatonium, a type of metal said to be stronger than previously discovered metal.
[9] Developed and published by Level-5 and directed by Akihiro Hino, the game released in Japan on November 11, 2021, for the Nintendo Switch and PlayStation 4.