The Comprehensive Guide to Rummy and the 51 Bonus Rummy is a well-known card game that has enthralled players for centuries all over the real online casino slotsworld. It was first created in the early 1800s and has since undergone numerous modifications, each with its own set of guidelines and gameplay features. Rummy is essentially a skill-and strategy-based game in which players try to arrange their cards in sets or sequences.