As the name suggests, this classic money-themed slot by Microgaming is about four kings and their treasures. The slot got released in June 2015 and got ranked as one of the most popular slots. Punters love it for its low staking limits, high RTP, and incredible bonus features. Even better, the slot is available in free mode, which punters can play before staking their hard-earned money to see what to expect. Kings of Cash features 5 reels and 3 rows, and 15 non-fixed paylines.