Number of copies sold doesn't necessarily equate into covering your production costs. Particularly when the longer the sales tail is on a game, the more heavily discounted those copies are. For example last year I bought a publishers pack on Steam that came with various games, including the following : Tomb Raider, Tomb Raider 2, Tomb Raider 3, Tomb Raider: The Last Revelation, Tomb Raider: Chronicles, Tomb Raider VI: Angel of Darkness, Tomb Raider: Legend, Tomb Raider: Underworld and let's not forget Laura Croft and the Guardian of light as well. I believe there was about a dozen other games involved in that pack as well and the price was less than 30 dollars.