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Level select: Press Start to pause game play.
Select "Codes" at the option screen, then press Down,
Left(2), Down, Left, Down, Right, Down, Left, Down. A
message will confirm correct code entry. Return to the
main menu and hold R1 to display the level selection
screen.
Super weapons: Press Start to pause game play.
Select "Codes" at the option screen, then press Right,
Up, Down(2), Up, Right(2), Up, Down(2). A message will
confirm correct code entry.
Additional special features: Press Start to pause
game play. Select "Codes" at the option screen, then
press Left, Down, Up, Left, Right, Up, Down, Left,
Right, Down. A message will confirm correct code entry.
Additional items: Press Start to pause game play.
Select "Codes" at the option screen, then press
Right(5), Left (3), Up(2). A message will confirm
correct code entry.
Easy mode: Press Start to pause game play. Select
"Codes" at the option screen, then press Up, Down(8),
Up. A message will confirm correct code entry.
Normal mode: Press Start to pause game play.
Select "Codes" at the option screen, then press Up,
Down, Up, Down, Up, Down, Up, Down, Up, Down. A message
will confirm correct code entry.
Difficult mode: Press Start to pause game play.
Select "Codes" at the option screen, then press Down,
Up(8), Down. A message will confirm correct code entry.
Higher quality video: Note: You must have a
progressive scan television monitor to use this code. If
you enable it without this type of display, the screen
will turn blue and you will have to reboot the
PlayStation2. Press Start to pause game play. Select
"Codes" at the option screen, then press Right, Up,
Right(2), Up, Right(3), Up, Right. A message will
confirm correct code entry.
Defeating the first Boss: First, use IRIS' laser
to hurt him. The LED will then fire blue lasers. They
can fly through walls; do not try to hide. Quickly
switch to E.Z. and destroy the laserballs by shooting at
them. Then, use IRIS again. Repeat this until he is
defeated.
Gameshark codes
[M] Must Be On F444BE34
FB74051E
Infinite Grenades (On Pick Up) 2480109E AE94C135
249810A8 2EB5C18C 241810A8 26B4C1A6
Infinite Ammo 24C21388 865C47DD
Infinite Health 24989A88 8D541559
Infinite Money 2451A0F2 91E401FB 24C3BBCA 99C64161
24C1BB78 11EC0152
Infinite Oxygen 24981EAE 03D4019D
Unlock All Levels 44509728 30F05388 3902D7E1
9FAB91E0 14509728 34F01398
Unlock Aromatum Chaos 04509728 34F05398
Unlock Chryse Canal 04509729 34F07388
Unlock Kuztnetsov Diamond Mine 04509729 34F05388
Unlock Phobos Station 04509728 34F05388
Unlock Red Rock Sally Port Zulu 04509729 34F053A8
Unlock Red Rock Township 04509728 34F053A8
Unlock Red Rock West Gate 04509729 34F073A8
Unlock Shalabatana Vallis 04509728 34F07398
Unlock Thermal Research Outpost 04509728 34F07388
Unlock Xanthe Terra Power & Light 04509728 34F073A8
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