Note: This game was released under two different names:
      "Deadly Arts" and "G.A.S.P. Fighter's NEXTream"

Fight as Gouriki:
  Press UP(2), DOWN(2), LEFT, RIGHT, LEFT, RIGHT, B, A at the
  title screen.

Fight as Reiji:
  Press A, B, RIGHT, LEFT, RIGHT, LEFT, DOWN(2), UP(2) at the
  title screen.

Alternate costumes:
  Hold L and press LEFT or RIGHT at the character selection screen.
  The character portrait will change colors to confirm correct code
  entry. Then, select a character while L is still held.

Special stage:
  Break down all ten buildings in a single stage. Return to the
  stage selection screen and press START.