There are lots of sites that offer the kind of thing you're asking - soundsnap.com is $1/sound, for instance, allowing you to use it royalty free. I don't thin

There are lots of sites that offer the kind of thing you're asking - soundsnap.com is $1/sound, for instance, allowing you to use it royalty free. I don't think the developers would want the music for their games (e.g. Super Meat Boy) used in other games, especially if they paid for an original composition, because it would dilute their brand. I don't know what license terms the parties agreed to, though, but it's either up to the developer or the music artist. Either way it would be fairly complicated to bundle - I'm pretty sure the license terms wouldn't be the same for all parties.