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.
Parke H. Davis
...abundant evidence may be marshalled to prove that this is the oldest outdoor game in existence. In the 22nd chapter of Isaiah is found the verse, "He will turn and toss thee like a ball." This allusion, slight as it may be, is sufficient unto the antiquary to indicate that some sort of game with a ball existed as early as 750 years before the Christian era, the epoch customarily assigned to the Book of Isaiah.