[ubermonkey]

This seems related to a hallucinogen-related epiphany I had once whilst hanging out with a gamer-heavy crowd 30 years ago. It's this:

All games share one unwritten rule, which is that if you can convince all the other players that you've won, the game is over.

[sebastiennight]

This seems incomplete, as in many games, one player winning does not interrupt the game. You're just first to leave the table, but others keep playing for 2nd, 3rd, and up to nth (last) place.

[ubermonkey]

Ok, fair. In most games, though, once there's a winner, play stops.