If you didn't know that it was a LotR reference, "one coin/token to play them all" would still sound pretty authentic. It's not that far off from "One Token One Credit"
Well, then use "One Token One Credit". Problem solved.

and certainly more authentic than "Game Not Over". I've never seen that on a token anywhere.
I agree that "Game Not Over" doesn't sound authentic on an arcade token; I resisted it from the beginning. "Where The Game Never Ends" sounds like it could be on an arcade token (not far off from "Where A Kid Can Be A Kid" of Chuck E. Cheese fame), but "Game Not Over" does not. The compromise seems to be "The Game Never Ends", which is unsatisfying, but most compromises are. I still think the simple addition of "Where" to the beginning makes the token far more realistic, but I'm very much in the minority.
But the time for that debate has passed; those who will take either saying are happy, and all that's left are the partisans who will never change their mind, and get more stubborn and unhappy with every argument. Pretty soon, people will be slinging unhappy smilies around, and eventually someone will compare someone on the other side to Hitler. Godwin's Law in action.

(EDIT: Spelling and formatting)