2 Xtreme

Tricks to try!:
Snowboard

Triangle, Square, X, O

Mountain bike
X, square, triangle, O
X, O, Square, Triangle

Skateboard
Triangle, X, Square, O

In-line skate
O, Square, X, Triangle

Ace Combat 2

You can do anything you want!:

Music Test
Complete the game with a rank higher than First Lieutenant. A selection for music player mode will appear in the options menu. Press L1 or L2 to jump to the next track, R1 or R2 to jump to the previous track, Circle to select a track, Select to toggle the screen, and Square, Triangle, or X to quit.

Free Mission Mode
Complete the Kingpin mission. A "Free Mission" option that allows any mission to be played will appear at the opening menu.

View All Aircraft
Complete the game with a rank of General.

Lock Replay View
Hold Square during a replay to lock the camera.

Alternate Mission Map View
Highlight the "Mission" option on the mission selection screen, and press Select.

XFA-27 Fighter
Complete the game under normal difficulty. Play the game again under hard difficulty and reach the low altitude surprise attack mission (Dead End). Locate and destroy the four YF-23As in the special Fox Force Four squadron south of the target. A medal and the XFA-27 will be awarded on the debriefing screen.

Adidas Power Soccer

The #1 Team, that rocks all:
In the options menu Press: L2 , R2 , Square, X

Advanced soccer techniques:
These moves should help you tremendously during a soccer match:

Legend:
T = Triangle
S = Square
O = Circle
X = X

Back Flick: O + T

Back Heel: S + X

Power Shot: T + X

Pull Shirt: T + O (defense only)

Karate Kick: S + X (defense only)

Two-Handed Push: T + X (defending)

Female Commentator:
Go to arcade mode, highlight the commentator option, and press the Circle and Square.

Adventures of Lomax

Allows for players to skip levels:
Press: Down, Start, Up (PRESS & HOLD), Left 1 (PRESS & HOLD),Triangle Circle, X, Square. A number should have appeared to the left of Lomax). Now to skip a level (PRESS & HOLD) to skip a level: UP, Left 1, SELECT & START. You can now enable the Cheater Chopper cheat!

Take flight at will:
You can only access this code after you've accomplished the Level Skip Cheat. Once in Helicopter Mode: Select the chopper, then press LEFT 1 & SQUARE to fly around the levels.

Andretti Racing

Bring up a menu of secret options for modifying your car on the fly:
While racing, pause game, and select "race strategy." Now press and hold L1+L2+R1+R2+X+O+Select.

Armored Core

Different camera views:

Fixed Camera:
You can switch to a fixed camera angle by pressing Circle + X + Start.

Mech View:
To switch to first-person view during play, press Triangle + Square + Start at the
same time then unpause the game. To return to third-person view,
just pause the game then unpause it.

Auto Destruct

Level Codes:

2nd level: gSMTkJBVm
3rd level: gSMTJfYsZ
4th level: gqBJCkLmv
5th level: gvBKYgfNv
6th level: fnFKgdHNr
7th level: fnFKfdHNf
8th Level: fnBVgqHNr
last level: rrJTfSFTr

Activate Blood mode, Angel mode, and tons of other cheats.:

During play, pause the game and press Up, Down, Left, Right, Down, Right, L1, R1, R1 to gain access the Cheat Menu. From
there input any one of the following codes for the desired effect.

Blood Mode: Press L1, Down, R1, Left, L1, Right, R1

Angel Mode: Activate Blood Mode, then press Up, R1, Down, L1, Up, Left, R1, Right, L1.

Extra Tune: Press DOWN, L1, L1, O, O, R1, UP, SQUARE, L1

Invulnerability: Press L1, L1, L1, L1, LEFT, O, O, SQUARE, L1

Next Mission: Press L1, RIGHT, DOWN, LEFT, UP, R1

Tune Up Menu: Press L1, R1, L1, UP, DOWN, O, DOWN, RIGHT, LEFT, SQUARE, R1

Car Select (from Tune Up menu): Press LEFT, R1, RIGHT, R1, LEFT, R1, RIGHT, R1

All Time Trials: Press R1, L1, O, LEFT, O, O, RIGHT, L1, O

Mission Select: Press UP, DOWN, O, L1, R1, L1, O, UP, DOWN

More Cash: Press L1, R1, UP, O, DOWN, SQUARE, LEFT, R1, L1

More Nitros: Press L1, O, DOWN, L1, UP, SQUARE, O, R1

Infinite Fuel: Press L1, O, RIGHT, L1, O, R1, L1, UP, R1, DOWN

Azure Dreams

Life Replenish:
Go to any corner and press Triangle + Circle repeatedly until your up to full power!

Ballblazer Champions

Shrinking Rotofoil (happy face code), and Master Dome Level Select:
Abbreviations:

S = square
T = triangle
O = circle
X = easy to figure out!
L1, L2, R1, R2 = see above

Shrinking