Well, there now seems to be case law on the topic: http://www.wired.co.uk/news/archive/2012-06/20/tetris-clone-ruling http://www.wired.co.uk/news/archive/2012-0

Well, there now seems to be case law on the topic: http://www.wired.co.uk/news/archive/2012-06/20/tetris-clone-ruling http://www.wired.co.uk/news/archive/2012-06/20/tetris-clone-... This could be interesting given the sheer number of clones on the app store. I wonder how many game developers actually have trade dress protection on their game?