Usually, the jackpot can be won at random or involves a unique bonus game to unlock it. As there are thousands of free casino slots to try, it’s no surprise they are not all the same. You can enjoy tons of different types of slots from Megaways to progressive jackpots. An Ancient Greek-themed classic made by the famous US slot machine developer IGT. Cleopatra has an RTP of 94.96percent and is a medium volatility slot with the chance to win 1,750x your stake.