Prevalence: Game in which play determines objective (or, in other words, the games objective isn't known until the end)

Rules: Players take turns picking random numbers until they have picked eight numbers. If there are more odd numbers picked than even numbers then the highest number out of each two numbers picked wins; if more even numbers are picked than odd numbers then the lowest number out of each two numbers picked wins.

What is the point of the game? – Because the objective of the game is determined by the prevalence of one type of number then the objective is not known until the end of the game.

Example of game:

Player A: 5

Player B: 8

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Player A: 9

Player B: 7

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Player A: 2

Player B: 3

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Player A: 5

Player B: 6

More even numbers have been picked than odd numbers thus the lowest out each two numbers picked wins -  5 beats 8 (point to Player A) ; 7 beats 9 (point to player B); 2 beats 3 (Point to player A); 5 beats 6 (Point to player A) – Player A wins the game 3 points to 1.