I invented this game (with Karen Bryla) because it seems like when you know someone well enough, 75-80% of any Rock-Paper-Scissors games you play with that person end up in a tie. Well, here is a slight variation that reduces that probability. (Note that for those of you who like to swing your fist back and forth and say, "Rock, Paper, Scissors, GO!", might want to continue to do that, replacing "Rock" with "One," "Paper" with "Two," and "Scissors" with "Three.") This version is also nice because it satisfies the Law of Fives.
http://www.samkass.com/theories/RPSSL.html
on thinkgeek
http://www.thinkgeek.com/tshirts-apparel/unisex/generic/b597/?cpg=ab
I am awful at it! đ