Episode: "Broadway Bro Down” (s15e05)
Original Air Date: October 28, 2011

The wildly popular German board game The Settlers of Catan makes a digitized appearance in the "Broadway Bro Down" episode of South Park where Larry, the son of a radically vegan couple falls in love with Stan's older sister Shelly. The punchline of the game being featured is that instead of a video game version of the original, it's still in board game format. 

Awesome throw to such and esoteric game, solidifying how nerdy Matt and Trey truly are.