Virtua Squad 1 (PC)
At the Sega screen: Hold the reload button and press Up, Down, Left, Right. At the AM2 screen: Hold the reload button and press Down, Up, Right, Left, Up, Up, Left, Right. Note: if you are using the mouse; switch to keyboard or joystick and then enter the codes. When done, switch back to mouse. After entering these codes you will be able to select Ranking Mode, Freeplay, 9 Difficulty levels, Options Plus menu, Japanese Language, Mirror Mode, Gun Select (pause the game while playing with F3 and use Reload button to select the gun you want, including a new, secret gun!) and a Book Keeping Mode.