Unlock Snoop Dogg Mission:

During gameplay press START/PAUSE and enter the City Map screen (you must be outside). Press R, L, Up, Right, Left, Down, Z, Z, A, Y, X, Y . You will hear a confirmation sound if entered correctly.Save and exit the game, to acces the Snoop Dogg missions load the saved game and enter the Mission Select screen and select the Snoop Dogg head Icon.