5: Pictionary (1985) - Guess the picture someone else is drawing from one of multiple categories. Race to the finish line. It's like charades, but on paper and with a goal. Okay, just trust me--it's a lot more fun than it sounds. Plus, it has staying power--this game has been popular since it debuted. That's just under 30 years, which doesn't seem that long--but consider that hundreds (maybe thousands) of board games have come and gone since then.
4: Risk (1957) - World domination! Risk let's you control armies, inch your way into other nations' lands, build up troop strength, and strategically align yourself with others to conquer the globe (or at least a Mercator projection of it). It's one of the best multi-player games ever created, and it is easily the best "war" game (sorry Stratego and Battleship--but it isn't even close).
I can't imagine there's a problem with this list--(unless you are a kid--see the link above to kids' games). But if you have one, let me hear it in the comments below. And as always, find us on Facebook, follow us on Twitter, or share us with friends!