Shadow Master Cheats (PlayStation)

Begin game play, eliminate the first two aliens and enter the room from which they
emerged. Then, enter one of the following codes to activate the corresponding cheat
function. 

  Level Select
  Hold L1 + L2 + R1 + R2 + Triangle, then intentionally lose. Keep the buttons held
through the ending FMV sequence. A green light will confirm correct code entry. A new
starting level from 1 to 16 may now be selected at the opening screen. 

  Unlimited Energy
  Hold L1 + L2 + R1 + R2 + X, then intentionally lose. Keep the buttons held through the
ending FMV sequence. A blue light will confirm correct code entry. 

  All Weapons With Unlimited Ammunition
  Hold L1 + L2 + R1 + R2 + Circle, then intentionally lose. Keep the buttons held through
the ending FMV sequence. A red light will confirm correct code entry.