Armored Core
In the original continuity established by 1997's "Armored Core" through 2001's ', Earth experienced a cataclysm known as the "Great Destruction" and humanity has been forced underground. Corporations begin fighting for dominance, leading to the increasing reliance on Armored Core pilots called Ravens. Following the events of 1999's ', humanity rebuilds and colonizes Mars. Through 2000's "Armored Core 2" and its expansion, "Another Age", the fledgling Earth government struggles to maintain power as opportunistic corporations exploit the power gap and rebel groups resist against the hegemony of government and business interests.