The biggest jackpots come with progressive jackpot games like Mega Moolah, Major Millions, Treasure Nile and Wheel of Wishes, with its incredible $2 million WowPot! feature. These games are all slots but table games like blackjack also come with progressive jackpots. The way progressive jackpot games work is that a fraction of every bet placed on a progressive jackpot game goes into the pot until somebody wins the full amount.