Jackpot King Games work the same way any other conventional slot machine would, only with the addition of the progressive jackpot.
At any moment, you can land five Jackpot King symbols and activate the bonus. Land 15 crown symbols on a separate screen to then reach the final phase. If you don’t manage to do that you will still enjoy a win for making it this far, regardless.
This Jackpot King progressive feature then gives you the chance to land either the regal pot, royal pot or Jackpot King pot value.