Daemon X Machina is a third-person action-shooter game in which players; represented by their avatars called Outers, pilot highly customizable mechs known as Arsenals on missions to suppress various mechanized foes. Choose and equip your Arsenal with a multitude of weapons, obtain more from downed enemy Arsenals, and swap them on the fly to suit your strategy in the face of ever-changing threats.

After a moon collided with the Planet, it radiated a special energy that turned artificial intelligence against humanity. The Outers, a group of pilots who command mechs, gained special abilities after being afflicted by the mysterious energy. They act as humanity's protectors and guardians as the war with the Arms of Immortals (AIs) rages on.[1]