MDK2: Armageddon:
Invicibilty-press START to pause. Press and hold L2+R2 and while doing this press up,up, down, down, left, lfet, right, right, square, triangle, square, triangle, select.
Matrix camera-Press Start, and press and hold L2+R2. You can now rotate the camera.

Starwars Star Fighter:(These are the passwords you enter in the code setup menu)
Unlock all levels-OVERSEER(Gives all except the bonus multiplayer missions
Bonus multi missions-ANDREW
Secret ship for bonus missions-BONUSSNF
Disable cockpit display-NOHUD
Ship and cat pics-HEROES
Pre-production art-PLANETS
Pictures of Simon-SIMON
Development team pics-TEAM
View credits-CREDITS
Invincible mode-MINIME
Jar Jar mode-JARJAR(Will reverse ships controls)
Christmans FMV-WOZ(See this video its kinda funny)

Tony Hawk Pro Skater 2:(All tricks must be done with the game paused)
Unlimited Specials-Hold L1 and press X,triangle, circle, circle, up, left, triangle, sqaure.
Turbo Mode-Hold L1 and press down, sqaure, triangle, right, up, circle, down, sqaure, triangle, right, up, circle.
Louie Anderson mode-Hold L1 and press x, x, x, x, left, x, x, x, x, left, x, x, x, x, left.
Kate Moss mode-Hold and press L1 and press x, x, x, x, sqaure, x, x, x, x, sqaure, x, x, x, x, sqaure.
Super mode(unlock all the FMVs, extra skaters, and extra levels)-Hold L1 and press x, x, x, sqaure, triangle, up, down, left, up, sqaure, triangle, x, triangle, circle, x, triangle, circle.

SSX:
Open all course hints-Hold L1+L2+R2 and press circle, x, circle, x, circle, x, circle, x.
Running man mode-At options screen hold L1+L2+R1+R2 and press sqaure, triangle, circle, x, sqaure, triangle, circle, x.