PlayStation Portable

The PlayStation Portable, or PSP, is a handheld games console made by Sony.

The two Grand Theft Auto games released for the console have both been huge successes in terms of the number of sales in comparison to other PSP games.

On June 22nd 2009 it was announced that GTA: Chinatown Wars would be ported to the system.

Grand Theft Auto games for the PSP

Wikipedia has an article on:

PlayStation Portable

Grand Theft Auto: Liberty City Stories (2005)
Grand Theft Auto: Vice City Stories (2006)
Grand Theft Auto: Chinatown Wars (late 2009)