Here are some cheats and tips for the game Gun Griffon.
Press the following buttons very quickly at the title screen with words
“Press Start Button:”
Hard Mode –> Down, C, C, A, Start
Infinite Jump –> Up, Right, Down, Left, Z, Start
Disable Radar –> B, B, B, Down, C, Start
Infinite Ammo –> B, B, B, C, Start