The service has been operating in beta from the start of the year and so far 100 tracks have been approved and made available to gamers.

These include songs from acts such as The Hold Steady, KMFDM and The Shins.

It is not, however, a simple case of acts submitting tracks and they then appearing on the store.

Songs have to be turned into a game-compatible file format and then submitted to MTV/Harmonix for approval. The acts can set the ...