By Scott Kim: “As a computer game designer, I’m always looking for new ideas. One of the best places to look is in earlier non-computer games, such as board games, mechanical puzzles, and paper-and-pencil games. There’s also a wealth of material in books about recreational mathematics that is aching to be exploited. But there’s more to translating an idea into the computer medium than merely copying it. Here are some of the lessons I’ve learned about what works. Most of the examples come from puzzle games — my specialty — but many of the lessons apply to other sorts of games as well.”