Games in the "Grand Theft Auto" series have supported custom soundtracks, using them as a separate in-game radio station. The feature was primarily exclusive to PC versions, and was adopted to a limited degree on console platforms. On a PC, inserting custom music into the stations is done by placing music files into a designated folder. For the Xbox version, a CD must be installed into the console's hard drive. For the iPhone version of "", players create an iTunes playlist which is then played by the game.