This idea would later be at the heart of many Rummy variations. The different varieties of Rummy that we see t𝑠𝑎𝑡𝑡𝑎 𝑘𝑖𝑛𝑔oday are the result of the game's cross-border absorption of elements from different cultures. Rummy saw a dramatic shift in its history during the 20th century as it became incredibly popular in both Europe and the US.