Multiplayer is a feature in Grand Theft Auto games that allows the player to play with a friend. This feature was first introduced in Grand Theft Auto 1 and in later GTA games, including Grand Theft Auto: Vice City Stories.
The feature was originally going to be fatured in Grand Theft Auto III, but was scraped and removed before the game's release. In the PS2 and Xbox version of Grand Theft Auto: San Andreas, the game features co-op mode, which allows 2 players to 'free roam' or go on a 'rampage'. This feature was limited which both player had to stay within range of one another. Also, some weapons, like the Sniper Rifle and the Rocket Launcher cannot be used.
Multiplayer later became available on the PSP verison of Grand Theft Auto: Liberty City Stories and Grand Theft Auto: Vice City Stories.