Level replay:
Press A, Up, R, Z, Down, Z, C at the load game screen to replay any previously completed level.

Sound test:
Press Right(2), Left, Z, A, X, Y at the title screen.

All items in shop:
Highlight the "Buy" option on the shop menu and press R, Down, L, Y, X, B. A sound will confirm correct code entry. All items in the game will be available for purchase at the current shop.

Split-screen opening FMV sequence:
Hold L when the NCS logo appears to split the opening FMV sequence into four screens. Release L to return to a single screen display.

Hidden files:
Insert the game disc into a PC compatible CD-ROM drive and decompress the "graphic.lzh" and "omake.lzh" files to access character designs and development team diary.