Shoot, upgrade, conquer enemies, defeat bosses, acquire achievements, collect gems, all in an attempt to save yourself and your gun from the clutches of the evil Professor.
As a gem hunter, go find all the gems stolen by monsters. There is a time limit on each stage so be sure to collect all of them before the time runs out.
Mankind has been traveling through a cloud. The sky has been dark ever since the war began. It's time for mankind to end the war before the war puts an end to mankind.
While gangsters were hanging around and disturbing the residents, your soldiers got caught in the middle. It's time to fight, kill all the gangsters and save yourself from the clutches of the gangsters!
