http://www.kongregate.com/games/pixelate/understanding-games-episode-1

http://www.kongregate.com/games/pixelate/understanding-games-episode-2

http://www.kongregate.com/games/pixelate/understanding-games-episode-3

http://www.kongregate.com/games/pixelate/understanding-games-episode-4

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"I Have No Words & I Must Design" by Greg Costikyan, designer of board, roleplaying, computer, online, mobile and social network games.

http://www.costik.com/nowords.html