The war of Operation Gravity has been raging on since 2684 because of a device called OPG that can control gravity, the year now is 2620. In this sci-fi shooter you use advance technology to destroy your enemies and to either destroy or use OPG. Now chose your side, are you fighting for Z-TECH so that gravity can be used for science, or are you fighting for POWER-SHIELD so that OPG will be destroyed.