A multilevel game includes a base game in which game credits and free passes may be accumulated and saved for play in a bonus event. The bonus event comprises a tic tac toe-like game in which a player is required to correctly answer trivia questions in order to receive a marker in a space of a matrix....http://www.google.es/patents/US20030119573?utm_source=gb-gplus-sharePatente US20030119573 - Gaming method, device, and system including trivia-based bonus game
Gaming method, device, and system including trivia-based bonus game
Número de solicitud: 10/028,756 Número de publicación: US 2003/0119573 A1 Fecha de presentación: 21 Dic 2001 Patente emitida: US7175521 ( Fecha de emisión 13 Feb 2007)
