Another one from my backlog: 2D Boy recently completed an ongoing feature on the development of their hit WiiWare game, World of Goo, from the first prototype with placeholder (Family Guy!) graphics, to slightly overambitious later versions of the game. (At one point seven chapters were planned — yikes!) Very interesting stuff if you’re curious to know just what goes into making a great game. They’ve even included downloads of some of the iterations.
I’ve collected all the links here, for your convenience:
Part 1, Part 2, Part 3, Part 4, Part 5, Part 6, Part 7