From PPI
The German PP played on the 31. March 2007 a Killer-Chess in Berlin and Nürnberg. It was a Demonstration against the plans of mainstream politician which want to outlaw Computergames with violance. Such as Counter Strike, GTA, WoW and so one.
Pictures
You can find a lot of pictures in the german wiki
Video
Watch prep 1 and prep 2 and the game 1 and game 2
Download the videos prep (Xvid, torrent) and game(Xvid, torrent)