Cheat Mode: Press "Start" to pause game play, then enter the following codes to unlock the corresponding cheat function. A message will appear at the bottom of the screen to confirm correct code entry All skills at maximum: Hold R and press Left, Up, Right, Down. Extra skill points: Hold R and press Up(2), Down(2). Full ammunition: Hold R and press Up, Left, B, Down. Full health: Hold R and press Down(2), Up(2). Health limit increased: Hold R and press A, Y, Left(2), Right. Invulnerability for player: Hold R and press B, A, X, Y. Invulnerability for allies: Hold R and press B, Y, A, X. Kill all the enemies: Hold R and press Down, Up, B, Right. Player has big gun: Hold R and press Left, Right, X, Y. Player has all Nazi weapons: Hold R and press Up, Down, Left, Right, A. Player has all U.K. weapons: Hold R and press Up, Down, Left, Right, Y. Player has all U.S. weapons: Hold R and press Up, Down, Left, Right, X. Rapid fire mode: Hold R and press Down(4).