Catan

Originally "The Settlers of Catan," Klaus Teuber's 1995 design has sold over 40 million copies and single-handedly introduced modern board gaming to the mainstream. You trade sheep for wheat, build settlements, and argue with friends about who's blocking the longest road — it's capitalism simulation disguised as a family game. Catan tournaments attract thousands of players worldwide, and the game has been translated into 40 languages. It's the "I have wood for sheep" joke that launched a billion-dollar industry.