After a Rubicon 3 cataclysm from a destructive substance, a mercenary enters a faction-driven war for it, fifty years later.

Set five decades after a cataclysmic event triggered by a potent substance on Rubicon 3, the planet's destruction fuels a complex conflict. As a mercenary, players journey to the ravaged world and become entangled in a multifaceted war. The quest unfolds as various factions vie for control over the enigmatic substance, revealing layers of political intrigue, personal stakes, and strategic battles.

Navigating through a landscape scarred by devastation, players must make pivotal choices that shape alliances and outcomes. The narrative's dynamic evolution, coupled with deep customization and intense mech combat, delivers a gripping experience that pays homage to the Armored Core legacy while pushing the series forward into uncharted territories.