Enter "KWNOHIRO" as a password at the suspicious looking pink tank in the first town.Boundbomb weapon
Enter "KKHWEEEE" as a password at the suspicious looking pink tank in the first town.AirGatling weapon
Enter "GSASINRI" as a password at the suspicious looking pink tank in the first town to unlock the AirGatling weapon for the sub-weapon B configuration. It is for shooting down aerial targets only.Grand Flag
Enter "ODGRITRO" as a password at the suspicious looking pink tank in the first town.Angel Wings special part
Successfully complete the game to unlock the Angel Wings part. These allow you to fly without using a lot of fuel.Devil Wing special part
Win all arena battles to earn the Devil Wing special part.Defeating the Last Master
The Last Master has three forms. The first two are easy -- shoot him and kill him. The last form is difficult. You have to shoot the tank under him and destroy it. He will fall down. Make sure you hit his face when he falls down. His armor is weak when you shoot him. However, it is difficult to shoot him when he falls down because the gears are moving. Be careful, as they may crush you. When the boss gets up, the tank that is under him regenerates and you have to destroy it again. Repeat this process until he is defeated. Note: Shooting his face has no effect.