In a distant future on a planet called Terra Nova, an epic war is waged between the AST and the ECEF. You are a "Gear" pilot for one of these sides as you join the battle for supremacy. You pilot the various Heavy Gears (large biped fighting robots) in a variety of missions, either playing through the storyline for both factions or participating in the endless dynamic war going on between the two. As you get promoted, you gain access to better Gears and more destructive weaponry to acomplish your goals.
This was the first "mecha" type game Activision produced after they lost the Mechwarrior license. Based upon another traditional pen and paper game created by the company "Dream Pod 9"