The year is 2061. Lerman Matsunaga corporation discovered Busterium at the bottom of the Pacific in 2032 and used it to build the Buster Engine — a clean energy technology adopted globally to replace fossil fuels and nuclear power. All of it is now managed by a centralized automated computer system called BAC. BAC has become self-aware and turned against humanity. A secret internal division had prepared for this: the Rolling Gun, a weapon operated through a brain implant. One RF-42R STORK pilot must fly into the old Lerman Matsunaga building — now a nearly impenetrable BAC fortress — and destroy it. The Over Power edition expands the original Rolling Gunner with additional content.