The present invention allows gaming devices to set or modify game parameters through the use of random events such as spinning slot machine reels and/or random number generators. In one embodiment, a player may purchase an entry into a bonus round of a bonus game, without first having to qualify for...http://www.google.co.uk/patents/US8142272?utm_source=gb-gplus-sharePatent US8142272 - Method and apparatus for facilitating entry into bonus rounds
