The jackpot bonus round is triggered completely randomly. When you enter this bonus, one symbol is selected as the Megapays symbol and it will be collected in the jackpot meter. Once you’re collected four Megapays symbols, you’ll win the Mini Jackpot and you can keep going until you’ve collected 15 for the Mega Jackpot. However, you can't land the jackpots in the Bonanza Megapays free play demo.