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.
Sáhkku
Daldøs is first mentioned in passing in a Danish work of fiction from 1876, the plot of which was set to the 1600s. The rules were not explained by the author, but an interested reader tracked down a person who knew the rules during the 1920s. The oldest surviving game set is no older than the early 1800s.