Tutorials about creating all sorts of games: 2D, 3D, in-browser, MMORPG, you name it. For now, there are only tutorials on the very basic in-browser 2D and 3D games. I'll try to expand it as soon as I can, with tutorials for al lot of different software packages, and more specific tutorials on creating actual games.
Prerequisites: Depends on type of game. Mostly, however, only very basic computer knowledge is needed.