Anyone ever came up with the idea of having a built-in music-player inside a game to play the music of the player's choice? I came to this idea when I found out how many players now are actually playing their own music as BGM when playing a game. I just thought why not just give the option to the player? A further expansion to this idea is to have several online radio stations hooked into the game. One problem I see in this idea is the lisence fee for this kind of music playing style, since MP3 now requires lisence.

Many, many games have built in media players. One example I can think of is Soldat, which has a built in Mp3 player, complete with Winamp playlist imports, etc.

I for one would like to see the use of these features increase, background music gets old very fast, and if you intend on playing the game for hours on end, almost all players will end up either turning on the radio, or their own music!

I think civ 4 has this. anyway, at least have an option to turn the music down, and keep the sound effects. I remember the lack of such an option made me angry playing marvel vs. capcom 2, where the music was ironic and awful.

Second Life not only has built-in music that each player can play in their owned area, but it runs teeny movies, too. As to the legality of it, that I don't know.

The XBOX had custom soundtrack support, and I think the 360. Unfortunately, I never got any games with that support.