Rock-paper-scissors variant (courtesy of Brendan Hansen of the Decision Space podcast):
You will need 3 tokens, representing rock, paper, and scissors, and a 2-space track for each token.
Place the tracks with one end toward each player and the tokens near them.
(You can also just have a dividing line and have the tokens off to one side at the start.)
Play rounds of rock-paper-scissors as normal. When a player wins a round, place the
token corresponding to the throw they used (R/P/S) on their side of its track. If it is
already on their side of its track, they have won the game.