Robert Prince, or Bobby Prince not only wrote music for Duke Nukem 3D but also penned memorable MIDI tunes for Doom, Doom II, and Rise of the Triad. With the recent Duke Nukem 3D: 20th Anniversary World Tour re-release the composer claims that his music was used without permission or compensation.

So then how does this translate into a lawsuit involving three parties? Well Gearbox is there because they're the publisher - and that makes sense. Gearbox CEO Randy Pitchford's inclusion comes down to Prince contacting Pitchford about royalties and compensation, where he was told that he would be "taken care of". Which never happened.

And Valve, because Steam distributed copies of the game even after the company was notified of the alleged copyright infringement. Valve did not respond to the notice.

You can check out the full document and filing here, and as far as legal mumbo jumbo goes this one is pretty easy to follow. As with any lawsuit this only presents one side of the story, but paints a clear picture of Gearbox ignoring the rights holder to the music featured in the original release of Duke Nukem 3D.