According to IGN, the Forza Motorsport 3 money cheat is an online exploit that allows players to accumulate an infinite amount of in-game currency. Forza Motorsport 3 was released for the Xbox 360 by Microsoft on October 27, 2009.
The infinite money cheat requires the player to have an Xbox Live Gold membership, an Internet connection, and a friend. The player must also have enough in-game money to at least purchase and fully upgrade one vehicle.
Step 1: Go online
To gain infinite money in Forza Motorsport 3, the player and a friend must go online with an Xbox Live Gold account.
Step 2: Make purchases
The player must purchase a 1969 Chevrolet Camaro Z28 from the in-game storefront, and then purchase all of the different engines for the Z28. Every part for each of the engines, including the aspiration parts, must then be purchased.
Step 3: Exit storefront
Once all of the engines and engine parts are in the inventory, the player should exit to the main menu. This will cause the game to save all of the purchased items.
Step 4: Sell all purchased parts
The player should proceed back into the game's storefront and sell all of the parts that were previously purchased for all of the engines. A large sum of currency will appear in the player's account. The player must not leave the engines menu after selling the engine parts, or the cheat will not work.
Step 5: Join friend's private lobby
The player's friend must start a private lobby, and then the player should click the Xbox Dashboard button to join. The player should enter the lobby, back out and quickly press B to go to the main menu.
Step 6: Enter storefront
The player should proceed back into the in-game storefront and find all of the engine parts still in the inventory even after selling them all earlier.
Step 7: Repeat selling process
The process of selling the parts, joining a friend's game and quitting should be repeated until the player is satisfied with the amount of money accumulated.