<i>into such a simple representation that conveys so much information in such a succinct way.</i><p><i>Techniques such as the puzzle flow diagram is an incredibly useful tool</i><p>I hope he knows that all game designers have to "convey so much information in a succinct way". He can commend Schafer for his craftsmanship, but the format of the game design document is hardly Schafer's own genius invention.<p>To his merit, though, we mere mortals hardly ever get to see this sort of internal documentation, even decades after a game is released. The gaming industry is unfortunately one of the more secretive industries in the tech world. Carmack and others have open-sourced their code, so it's nice to see the designers stepping up and offering their work as well.