Die Hard Arcade

Expert mode:
Highlight the "Die Hard Arcade" selection at the title screen. Hold X + Y + Z + B to begin game play with four credits and more challenging opponents.

Extra credits:
Play the Deep Scan game. A credit will be earned for the Die Hard portion of the game for every two submarines destroyed.

Using the Deep Sea bonus game, earn extra credits by getting high scores. You can get a maximum of 99 credits by using this method.
Information in this section was contributed by Tails_r.

Hyper Deep Scan:
Highlight the "Deep Scan" selection at the title screen. Hold X + Y + Z and press Start. This version of the mini-game has more enemy submarines for greater difficulty. Credits earned in this mode can not be transferred to the Die Hard portion of the game.

Hyper Deep Scan X:
Highlight the "Deep Scan" selection at the title screen. Hold X + Y + Z + B and press Start.

Alternate soundtrack:
Highlight the Diehard Arcade selection at the title screen, hold X + Y + Z, and press Start.

Play as Kris Thompsen in single player mode:
Remove controller one, then start the game with controller two.