http://www.mathsisfun.com/games/games-2.html
This site offers many (50 or more) games that are math related. I have been very successful at math hangman; I haven't missed a word yet! Several of the games are "real" games like battleship, mah jongg, and mastermind. Other games are more math related like random trigonometry and who wants to be a millionaire with multiplication facts. With so many games and puzzle games offered at this site, you will definitely find one that you enjoy. I'm going back to the math hangman (always choose the vowels first).