High Rollers Casino (PlayStation 2)
CheatingDome.com
Alternate costumes
Win tournaments to unlock different costumes for your character.
Cheat mode
Create a player with a female gender and "SAM" as a name to unlock all bonuses.
Easy money
If you have a lot of money, save before you go to a game. Then, bet all of it. If you lose, press Circle and exit to try again.