Possessive: Game ball vs Game's ball vs Ball of the game

[Godie]

I don't know what's the difference or when I have to use:
game ball
game's ball
ball of the game

I really want a very clear answer, please.

[Jamie (K)]

It's impossible to answer your question without context for the expressions. None of those expressions are commonly used, so we need you to show us what contexts you saw them in.

[Godie]

OK. And if I am speaking about a soccer game and the ball was lost. How can I reference thar ball?