GEX (PSX)

Power upS: (Pause the game and hold R1 while entering the code)
Infinite Lives: Up, Circle, Triangle, Down, Right, Square, Down
Fireballs: X, Up, Right, Up, Right, Right
Iceballs: Circle, Circle, Left, Down, Circle, Up, Right
Electricity: Right, Lef,t Right, Circle, Triangle, Right, Circle, Down, Right
Instant Speed: Down, Start, Right, Right, Down, Up, Start
Super Jump: X, Circle, Up, Up, Down, Right, Right
Invincibility: X, Square, Down, Down, Up, Down, Right

Level select:
While in the level selection dome, hold down R1 and press Select. Then
hit X, Square, X, Right, Up, Left, Circle, Circle, Down, Down.

Access all levels:
Go to any stage and hold R1 and press Select. Then hit Circle, Start, Right,
Up, Square, Left, Left, Up, Start

Secret levels of planet "X":
1) Find a bonus round in each world (Cemetary, New Toonland, etc.)
2) Achieve a perfect score in each round (you don't have to get a perfect
score in each round; 27 out of 30 barrels will do.
3) When you've beaten all 5 bonus rounds with perfect scores, you get all
five pieces to the Planet X remote.
4) If you get a Planet X remote piece and then you die before you finish
the level, you still keep the remote piece.
5) You have to collect all 5 pieces in one play session

Where to find the bonus rounds: There are bonus rounds in each stage of Gex
except Rez Knight Fever. Here's how to find them:

Cemetary: Play through the level unti you reach the camera. Climb up the
wall to the left (with a few spikes). look for the floating platform to
theright. Jump onto the platform, and keep going right until you reach the
bonus portal on the last platform.

New toonland: Climb up the level until you reach the camera with the remote
control directly above it. Climb up the remote pedastal. You should see a
green block to the left. Jump across the block, then run and fall to the left
(DON't JUMP!). Look for the arrow of golden bugs pointing down at the small
ledge with the bonus portal.

Jungle isle: Walk past the first camera and drop through the collapsing
section of the bridge. Swim left through the water and keep moving left into
the wall. You can't see the bonus portal, but you can hear it.

Kung fuville: Play through the level until you reach the third camera. Go to
the right until you reach some steps with a sumo wrestler on the right and a
flying eyeball to the left. Do a super-spring jump off the eyeball and bounce
up and left to the platform with the bonus portal.

Rezopolis: Play through the level to the second camera. Go to the right
until you need to climb upward. Scurry to the top and bounce left across the
acid bubbles to the ledge with the bonus portal. You don't even need tobounce
on the bubbles, if you jump far enough to the left.

Ending sequences:
#1: Beat the game without beating every level in Planet X
#2: Much cooler ending is shown when the player beats all levels of
Planet X and then beats Rez.

Easy way to Planet X:
Password: RYYRYXKB