Twilight Struggle
"Twilight Struggle" was the highest-ranked game on BoardGameGeek from December 2010 to January 2016. As of August 2018, the board game occupies a fifth spot. Being released in 2005 it is the oldest board game in the overall top 10 ranking.
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.