Reversi (Intellivision)
Here's an old favorite to really stimulate your strategic thinking! Bracket your opponent's pieces in any row (straight or diagonal) to "capture" everything in between. Play against a friend or take on the computer at any of three skill levels. Pick one of 3 board sizes... play short or medium-length games, or go for the challenge of the big hundred-square board! It's an easy game to learn. And takes smart moves to win!