Certain embodiments relate to a gaming system and method for playing a game which is able to achieve a jackpot outcome when a jackpot trigger condition is satisfied. The jackpot trigger condition may be changed on instructions from a jackpot controller. In one embodiment, the jackpot trigger condition of an electronic gaming machine is re-set from time to time by a jackpot controller. The system may be used to play games like Keno or Bingo on EGMs, the jackpot controller downloading jackpot trigger conditions for the Keno or Bingo game (e.g. Keno or Bingo numbers).