Gex 3: Deep Cover Gecko

Vault codes:
To enter the following vault screen passwords, play the hidden level and get all four vault "secret" keys. The passwords are entered at the vault screen.
Information in this section was contributed by kaloide30.

Eight Hit Paws
Enter Square, Diamond, Triangle, Triangle, Star, Diamond as a password at the vault screen.

Extra life
Enter Triangle, Circle, Star, Square, Square, X as a password at the vault screen.

Ten lives
Enter Square, X, Circle, Circle, Triangle, Square as a password at the vault screen.

Invincibility
Enter Square, Star, Triangle, Square, Triangle, Diamond as a password at the vault screen.

Toggle timer
Enter Square, Square, Diamond, Circle, X, X as a password at the vault screen. The timer may be turned on or off at the "Extras" screen.

Play as Alfred
Enter Square, X, Triangle, Square, Star, Star as a password at the vault screen. This is no longer effective after you leave Gex's HQ.

Play as Cuz
Enter Square, Diamond, Square, Square, Triangle, Diamond as a password at the vault screen. This is no longer effective after you leave Gex's HQ.

Play as Rex
Enter Square, Star, Star, Square, Triangle, Triangle as a password at the vault screen. This is no longer effective after you leave Gex's HQ.

View all FMV sequences
Enter Star, X, X, Circle, Square, Triangle as a password at the vault screen.

View FMV sequence 1
Enter Circle, Triangle, Square, Star, Diamond, Star as a password at the vault screen.

View FMV sequence 2
Enter Diamond, Star, Square, X, Triangle, Circle as a password at the vault screen.

View FMV sequence 3
Enter X, Diamond, Star, Triangle, Triangle, Circle as a password at the vault screen.

View all FMV sequences
Enter Star, X, X, Circle, Square, Triangle as a password at the vault screen.

Level select
Enter Square, Circle, Circle, Triangle, X, X as a password at the vault screen.

Gex quotes
Enter Square, Triangle, X Star, Square, X as a password at the vault screen. Press Start to hear various comments from Gex.

Debug menu
Enter Square, Square, Diamond, Circle, X X as a password at the vault screen. Press Start to enter the debug menu.

Information in this section was contributed by wwblas26.

Hint: Play as DracuGex:
Go to the clueless room in the Gex cave. Go up the stairs on the right to find a picture of DracuGex. Look into the picture and you will transform to DracuGex.
Information in this section was contributed by The Game Master.

Hint: Extra pawprints and extra lives:
TVs are placed throughout The Pole and other levels. Hit a TV and swallow the green bugs to get extra pawprints. Swallow the red bugs for extra lives.
Information in this section was contributed by PeTeRpAn2987.

Hint: Getting help:
Tailwhip the turtle to get various tips during the game.
Information in this section was contributed by PeTeRpAn2987.

Hint: Defeating Evil Santa:
Hit the presents that Evil Santa throws back at him. Be very careful doing this, as it is easy to miss and get hurt. You only need to hit him three times. There is a TV in the spot where you face Evil Santa. Wait until Gex is down to one or two pawprints. Then hit the TV and swallow the bug that appears for an extra pawprint.
Information in this section was contributed by PeTeRpAn2987.

Hint: Getting extra lives in The Pole:
Hit the Mailboxes, Elves, Soldiers, Penguins, and Presents to get flies. Collect fifty flies to get an extra life.
Information in this section was contributed by PeTeRpAn2987.

Hint: Skating elf:
Hit the first skating elf in The Pole level and a pawprint will appear in the sleigh.
Information in this section was contributed by PeTeRpAn2987.

Hint: High jumps:
Jump on the presents in The Pole level to get an extra high jump.
Information in this section was contributed by PeTeRpAn2987.

Hint: Other flies in The Pole:
To get more flies, return to the gate used to enter The Pole. There will be about eight flies here. When entering the gate, jump on the first present in view (not the moving presents). Gex will get an extra high jump and land on the rooftop. There are four flies located here.
Information in this section was contributed by PeTeRpAn2987.

Hint: Extra life bug in The Pole:
After Gex jumps on the house and get the files, go to the nearby cliff on the left. Keep moving until an indentation appears in the wall. There is a "Scenic View" sign at that location. Go to the end of it to find a TV with an extra life bug.
Information in this section was contributed by PeTeRpAn2987.

Hint: Bonuses at The Pole:
Go up the cliff that is visible when you enter the Pole to see the roofs of houses. Jump down the chimneys to find a few extra surprises.

Information in this section was contributed by PeTeRpAn2987.

Hint: Snowboarding tricks in The Pole:
Information in this section was contributed by PeTeRpAn2987.

360
Press B to do a tailwhip while jumping.

Nose grab
Do a flying kick (hold R and press A.)

360 nose grab
Get a large running start and do a 360 and nose grab. You cannot do them at the same time, but can get them both in one jump.

Hint: Training bonus:
After completing training, you will get a bonus and another door will open in the Gex Cave.
Information in this section was contributed by PeTeRpAn2987.

Hint: Bonus Gex Cave items:
There are four glass walls protecting items on the top level in the Gex Cave. Jump up and kick the glass to collect them. Note: This may require a few jumps in order to get correct timing to break the glass.
Information in this section was contributed by PeTeRpAn2987.

Hint: Extra lives and Rex:
Locate the Scenic View bridge by entering into different sections of the level until finding the place with two guards before another passageway to another section. Jump on the present right next to them to reach a ledge with a TV and the turtle. Push Rex over the edge, then jump down and push him into the fire. He will thaw out, and Gex will receive extra lives.
Information in this section was contributed by PeTeRpAn2987.