Power-up:
Pause game play during Salamander or Life Force. Then, press Up(2), Down(2), Left, Right, Left, Right, B, A, Start.

Upgrades:
Enter the options menu and set the game level to "Saturn Difficult". Begin game play and press Down(2), Left, Right, Left, Right, B, A. An upgrade will be awarded for each level completed.

Hidden pictures:
Insert the game disc into a PC compatible CD-ROM drive and enter the Omake directory to access various graphics files.