US Patent 10565831 Wager machine with an event triggered based on traded symbols

A gaming machine includes a credit input mechanism, a display device, symbol meters, a player interface, and a game controller. The player interface generates input signals representative of a trade offer. The trade offer specifies a first set of bonus symbols accumulated by the first symbol meters to be traded for a second set of bonus symbols accumulated by another gaming machine. The game controller randomly generates a game outcome displayed by the display device, and accumulates respective bonus symbols of the game outcome among the first symbol meters. In response to an acceptance of the trade offer, the game controller removes the first set of bonus symbols from the first symbol meters and adds the second set of bonus symbols to the first symbol meters. The game controller further triggers an event in response to the first symbol meters accumulating a winning set of bonus symbols.