Zeiram Zone Cheats - PlayStation
Primary Collection of Cheats
Extra hard difficulty
Hold [Left] for three seconds, then press [Right]
at the main menu. Next, press [Circle], [Triangle].
The "Option" selection will turn red to confirm correct
code entry. Enter the option menu to change the difficulty setting
to extra hard.
Play as the enemy
Press [Right], [Down], [Down/Right],
[Down], [Down/Left], [Left], [Triangle] at
the main menu. The "Game Start" option will turn red
to confirm correct code entry. Select "Game Start" to
access a menu that will allow all bosses and some enemies to be
selected for game play.