GTA games always offer a fun selection of cheats to experiment with. In the past, these cheats were activated by entering specific combinations of buttons on the controller, or by keying in specific words or phrases in the case of the PC versions. In Grand Theft Auto IV, the procedure involved dialling numbers on Niko's cell phone, and we expect this method to be carried on in GTAV.
Cheats make the game easier to play, for example by restoring the player's health, supplying ammunition or removing police 'wanted' levels. Sometimes, however, cheats can have interesting or unusual effects, and such cheats are added for comedic purposes or to make the gameplay more exciting. For instance, Grand Theft Auto: San Andreas had a 'chaos' mode which caused pedestrians to riot, and a 'slut magnet' mode which gave CJ a gimp suit and attracted the attention of sex-toy-wielding pedestrians!
Based on past experience, we expect to see, at a minimum, the following cheat codes in Grand Theft Auto V:

In GTAV we are hoping for a greater and more diverse selection of cheat codes to extend the fun factor and longevity of the game. In addition to the 'standard' cheats, we'd like to see flying cars, riot modes, unlimited health, bodyguards, and the ability to play as different characters. Check out some of the crazy ideas the GTA V community has come up with!