Even though you’re all looking forward to the official release of Blender 2.48 with the cool features of the new BGE and more, I made a game breifly in Blender 2.44 in which you can play around with a chain.
If you are interested in the motion, you can play around by your own with the .blend file. Press P key to start the game. Then press Space key to get a ball and hit it at the chain.
If you want to get rid of your stress much more, just hit B key. It would be really interesting and effective for stress reduction. Please play with it after your work.