Cheat mode: Successfully complete all objectives in the single mission dossiers. The following codes can now be enabled. Invincibility (self): Press Start to pause game play. Select the "Cheats" option, then press X(2), A, B, A at the cheat menu. Press Back to resume game play. Your first soldier will be invincible, but the remaining members of your platoon can still be harmed in single player mode. Note: You cannot complete the game normally when this code is active, as maps and dossier items can no longer be unlocked. Also, this code can be activated without first completing the single mission dossiers. Big heads: Press Start to pause game play. Select the "Cheats" option, then press A, X, B, Y, A at the cheat menu. Press Back to resume game play. A message will confirm correct code entry. Big bodies: Press Start to pause game play. Select the "Cheats" option, then press B(2), Y, X(2), A at the cheat menu. Press Back to resume game play. A message will confirm correct code entry. Chicken explosives: Press Start to pause game play. Select the "Cheats" option, then press X(2), Y, A, B at the cheat menu. Press Back to resume game play. A message will confirm correct code entry. Paper mode: Press Start to pause game play. Select the "Cheats" option, then press B, A, X, Y, A at the cheat menu. Press Back to resume game play. A message will confirm correct code entry. Characters will be two dimensional in this mode. Slow motion: Press Start to pause game play. Select the "Cheats" option, then press Y(2), B, X, A at the cheat menu. Press Back to resume game play. A message will confirm correct code entry. Run fast mode: Press Start to pause game play. Select the "Cheats" option, then press A(2), X, B, Y at the cheat menu. Press Back to resume game play. A message will confirm correct code entry. High pitched voices: Press Start to pause game play. Select the "Cheats" option, then press X, A, Y, B, X at the cheat menu. Press Back to resume game play. A message will confirm correct code entry.