The single-player story follows Carl 'CJ' Johnson, an ex-gangbanger who returns home to Los Santos from Liberty City after his mother's murder. The state of San Andreas consists of three metropolitan cities: Los Santos, based on Los Angeles San Fierro, based on San Francisco and Las Venturas, based on Las Vegas. state of San Andreas, which is heavily based on California and Nevada. The game is set within the fictional U.S. Grand Theft Auto: San Andreas is played from a third-person perspective in an open world environment, allowing the player to interact with the game world at their leisure.