Here is a game I made up that we like to play, I posted about it a while back:
The secret word game
Bunnnie and I get very competitive in our joint athletic, fitness, and recreational activities, so we often make "sexual bets" that the loser (or winner, depending on how you look at it

) has to pay off within a certain amount of time.
When we play games that require some level of concentration (chess, putting, scrabble, rope walking), we are not above (depending on how private we are) saying or displaying something to distract the other person. Of course, there are penalties associated with that... but all is fair in love and war.
And of course, there is role playing, of which there are already several threads on this site. Just dressing up differently and playing out (and videotaping) a scenario for sexual purposes is a wonderful game in itself.