More cars in garage
You can fit more cars in your hideout's garage than you are supposed to. In district two, the garage should only hold two cars but you can fit four in (or five if they are small). Park the first two besides each other next to the wall. Then, park each car after that next to the door. Get out and the door will open. Quickly drive the car in before the door shuts. Now all three or four cars are saved. In order for this to work you need to park them very close together.

Custom music
Copy some of your favorite MP3 files into the "mp3" folder in the game folder. Start the game and you will have a new radio station titled "mp3 player". Choose it to hear your own selections.

Cheat Codes
While playing a game, enter one of the following codes to activate the corresponding cheat function. If you entered the code correctly, the message "Cheat Activated" will appear. Note: Codes can be entered multiple times. For example, keep typing "gunsgunsguns" and you will have more ammunition as well as all guns. The "giveusatank" code can only be activated four times.