[Berserker]

It's not really redoing it(well maybe it is), but RTCW:Enemy Territory originally had a single player campaign, but it was supposedly too bad to be released so they just threw it out and instead only released the mp-campaign for free on the net(which is a huge cult-succes and truely an awesome game). I wish they would redo the sp-campaign and release it after all, cause it would be cool to play the mp-level single player style.