Not sure how you would create a game that already exists, and assume what you mean is that you physical produce an actual game that your read about. However, you have not provided enough information about the game for a proper answer to be given. Is the game one that has been around, for example, for a century or only a year? Was this game ever commercially produced? Was the game attributed to a particular person or company? Information of this type is needed to determine if the game (or aspects of it) might be covered by copyright or patent. Until it is determined what might be protected by copyright or patent protection, the question of the type of changes that may be needed cannot be answered.
Answered on Mar 28th, 2013 at 3:10 PM