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.
Ashtapada
Ashtāpada () or Ashtapadi is an Indian board game which predates chess and was mentioned on the list of games that Gautama Buddha would not play. Chaturanga, which could be played on the same board, appeared sometime around the 6th century in India. It could be played by two to four participants.