The rules, gameplay mechanics, and distinctive features that set these well-liked card games apart will be covered in detail in each section. A lot of diffall rummy. comerent variations of rummy are based on classic rummy. With a standard 52-card deck, two to six players are usually involved in this classic version of the game. The goal is clear: players must create runs (three or more consecutive cards of the same suit) and valid sets (three or four cards of the same rank).