Well, here is one site that offers life-sized tic-tac-toe and checkers: http://www.technoventures.net/mazes_games.cfm
To find some fun and educational board games, you can go on the Amazon website and search for board games. There, you will find a lot of items that fulfill your desire.
find someone who knows how.
Try Ebay
I found mine on Amazon.com.
you can get the drift board by defeated birdo
At target
In Board games dog's cage every lego game
You can find board games that adults will enjoy everywhere, but really it totally depends on what you're into, for example I love to play Cluedo and Monopoly and sometimes I even play Buckaroo!
Just go find some bodybags if you are going to be hiding a dead body.
As far as department stores, Walmart has the best selection on board games. Their prices are the best for any department store. You can find them online at eBay and Amazon.
One can find strategies for Reversi on websites dedicated to board game strategies. It is also helpful to check out forums dedicated to board games and board game enthusiasts.
Hoyle Board Games 4