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.
Cat's cradle
Cat's cradle is one of the oldest games in recorded human history, and involves creating various string figures, either individually or by passing a loop of string back and forth between two or more players. The true origin of the name is debated, though the first known reference is in "The light of nature pursued" by Abraham Tucker in 1768. The type of string, the specific figures, their order, and the names of the figures vary. Independent versions of this game have been found in indigenous cultures throughout the world, including in Africa, Eastern Asia, the Pacific Islands, Australia, the Americas, and the Arctic.