Grand Theft Auto: San Andreas is a sandbox action adventure game by Rockstar North for PC, XBox and Playstation 2.
quoted from wikipedia
Grand Theft Auto: San Andreas revolves around the gang member Carl "CJ" Johnson returning home from Liberty City to Los Santos, San Andreas, after learning of his mother's murder. CJ finds his old friends and family in disarray. Over the course of the game, CJ gradually unravels the plot behind his mother's murder.