All weapons: Press B, Up, Left, Down, Right, B(2), without getting any special weapons, during game play to get the best version of each weapon. Note: The directions are done on the D-pad and the code will increase the difficulty level significantly. This code can only be enabled one time. Full weapon damage: Press Down(2), B, Y, Down(2) during game play. Note: The directions are done on the D-pad. Sound test: Press Left(2), B or Right(2), B during game play. Note: The directions are done on the D-pad. Nightmare mode: Successfully complete the game to unlock the "Nightmare Mode" option at the Special Features screen. Alternate Hunter mode: Successfully complete the game to unlock the "Alternate Hunter Mode" option at the Special Features screen. Alternate ending sequence: Save at over 50 Innocents before returning to the train to unlock the good ending.