Duke Nukem Forever looked like vaporware for the longest time. Many assumed it would never see the light of day, but after 15 years in development hell, the title actually hit retail shelves and was quickly savaged by critics. Despite this, Gearbox boss Randy Pitchford boasted that it's selling well, like a "greasy hamburger," and publisher Take-Two confirmed recently on an earnings call that the game is actually profitable. How could this be? How could it have succeeded against all odds?