What is the most often played card game in world?

It's impossible to definitively say which card game is the most played in the world. There are many popular games played globally, and tracking precise numbers is incredibly difficult.

However, some strong contenders for the title include:

* Poker: Widely played both casually and professionally, with a large online presence.

* Bridge: A competitive game with a dedicated following, popular in many countries.

* Rummy: Many variations exist, making it incredibly popular worldwide.

* Spades: A popular trick-taking game, especially in the US.

* Go Fish: A simple and fun game for children, but also played by adults.

* Crazy Eights: A fast-paced and easy-to-learn game popular worldwide.

Ultimately, the "most played" title is subjective and depends on how you define "played." Factors like casual play versus competitive play, online versus in-person play, and regional popularity all come into play.