All weapons
Hold [R] + [L] (in order) and press [Y], [B], [Left], [Right], [B], [Y] at the options screen. Alternately, successfully complete the game in less than five hours and save the game. [Start] a new game with the saved game file to begin with all weapons with nine rounds of ammunition. Note: Only Elliot has all the weapons.
Unlimited secret remote bombs (Japanese version)
Press [X], [Y], [A], [R], [Start], [L], [Start] at the Blue Stinger title screen.
Hidden artwork
Place the game disc in a PC compatible CD-ROM drive to find more .BMP images from the game in the "omake" directory. Note: Two short voice samples in .WAV format are also in this directory.