Break the Bank
When you open the game, choose to create a new player and take that player to the Break the Bank machine, which claims a $10,000 payout. Select the options menu, then "Players" and "Replace." Pick a different player and immediately choose "Replace" again. Then delete the first and last player and build a new player from scratch. When you walk up to Break the Bank again, you'll have a minimum of $10 million. Some players have claimed the computer gave them more than $30 million. You may need to try this a few times for it to work properly.
Free Money
You need money to keep playing, and the game gives you one easy shot at free money. Visit the Progressive slot machine and stick around when it has an "under repair" sign on it. Hold down the P key and keep it pressed down. A menu should pop up saying a maintenance man is on the way. Select the cash out button and money will automatically be transferred into your account. This tricks the computer into thinking that you made a bet and were playing the machine when it broke. This cheat works as long as the Progressive machine is shut down.
Easy Money
At the start, choose to create or build a new character. Then visit the Flyin' High slot machine, which only accepts $25 bets or higher. As a new character you start out with $5,000 and you'll want to put it all into the machine. Keep playing Flyin' High until you reach 100 credits, then go immediately to the Hoyle Flush machine and spin the wheel. The game will beep two times and $100,000 is deposited into your account. Keep in mind that it won't work if you cash out the Flyin' High machine first.
2004 Cheats
If you own the 2004 version of Hoyle Casino, change the speed option to the slowest setting by selecting "environment" from the options menu. Stand in front of the Margarita Madness machine first and hold down the P button. The computer should award you $10,000. Keep using this trick at different machines in the casino and each time you'll win free money. You can also win money at the roulette table. When you lose there, select video poker and bet $100 on "Easy Money." When you exit video poker, any money lost from roulette is automatically put back in your account.