I know the basics of Cocoa and I have learned much OpenGL from OpenGL Programming Guide, but I still do not have skills to make Cocoa games. A tutorial about making a game would be very helpful, but I have not found any good tutorials. Either the code is not explained well, like in http://zerobyzero.ca/~ktatters/seasideTutorials/index.html, Core Animation is used instead of OpenGL (e.g. http://cocoawithlove.com/2009/02/asteroids-style-game-in-coreanimation.html), or it is old (http://www.amazon.com/Game-Programm...=sr_1_1?ie=UTF8&s=books&qid=1280486135&sr=1-1). What tutorial or book should I use? How did you learn Cocoa game development?