A gaming system includes a central server or controller operable to communicate a plurality of different commands to a plurality of gaming machines to provide non-tournament game play and to provide tournament game play on the same gaming machines. ...http://www.google.co.uk/patents/US20080070695?utm_source=gb-gplus-sharePatent US20080070695 - SERVER BASED GAMING SYSTEM AND METHOD FOR SELECTIVELY PROVIDING ONE OR MORE DIFFERENT TOURNAMENTS
