The game of Sorites (Named after the greek philosopher who created the Sorites Paradox)

Rule 1: An uncertain number of coins is placed in a heap between two or more players.
Rule 2: Players take turns removing 1 coin at a time from the heap.
Rule 3: The player to remove the last coin is the winner.
Why this works as a game: Because the heap is made of an uncertain number of coins thus no one can predict, atleast not at the start of the game, which player will be the one to remove the last coin therefore it is a gamble.
Note: Players are allowed to end the game as soon as it becomes apparent who will win unless, just for the sake of it, they wish to keep playing till the last coin.