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|activities=Running, kicking, batting, teamwork, hitting, pinball, new sport Silverball was invented by Adam Nelson and members of Obscure Games Pittsburgh. It was first played in Mellon Park, Pittsburgh, on May 6, 2010.

|designer=Obscure Games ...fall of 2009. It has been updated and improved by other members of Obscure Games since then, most recently, in June 2011. The game draws inspiration from ba