Street Fighter 3: Third Strike cheats and cheat codes for Playstation 2

Unlock Gill at the character selection screen:
Finish the game with all character with the "Normal" system direction.

Bonus options: 
Finish arcade mode as Gill. 

Unlock System Direction page 8: 
Finish the game with 5 characters with the "Normal" system direction.

Unlock System Direction page 9: 
Finish the game with 10 characters with the "Normal" system direction.

Unlock System Direction page 10: 
Finish the game with 15 characters with the "Normal" system direction.

Fight against Q: 
Do not lose any match until you reach the end of Level 8.

Alternate difficulty modes in Sean's bonus stage: 
Hold Down + LP + MK + HP when reaching Sean's bonus level for a harder mode.
Hold Up + LK + MP + HK when reaching Sean's bonus level for level 5. 

Unlock alternate clothes: 
Go to the character selection screen. Highlight any characters and
hold Start and press LP + HP + MK to unlock a hidden clothes.

For more costumes, you have to first finsih the game with a fighter.
After, highlight that caharcter and hold Start and press a Punch or Kick .