Go (game)
Go is an abstract strategy board game for two players, in which the aim is to surround more territory than the opponent. The game was invented in China more than 2,500 years ago and is believed to be the oldest board game continuously played to the present day. 
A 2016 survey by the International Go Federation's 75 member nations found that there are over 46 million people worldwide who know how to play Go and over 20 million current players, the majority of whom live in East Asia.
Mancala
Some historians believe that Mancala is the oldest game in the world based on the archaeological evidence found in Jordan that dates around 6000 BCE. The game might have been played by ancient Nabataeans and could have been an ancient version of the modern Mancala game.
Although the games existed in pockets in Europe—it is recorded as being played as early as the 17th century by merchants in England—it has never gained much popularity in most regions, except in the Baltic area, where once it was a very popular game ("Bohnenspiel"), and Bosnia, where it is called Ban-Ban and still played today. Mancala has also been found in Serbia and in Greece ("Mandoli", Cyclades). Two Mancala tables from the early 18th century are to be found in Weikersheim Castle in southern Germany.