[irq-1]

This? https://boardgamegeek.com/boardgame/14451/nomic

> In the words of Nomic's author, Peter Suber: "Nomic is a game in which changing the rules is a move. In that respect it differs from almost every other game. The primary activity of Nomic is proposing changes in the rules, debating the wisdom of changing them in that way, voting on the changes, deciding what can and cannot be done afterwards, and doing it. Even this core of the game, of course, can be changed."

[mikelevins]

That’s the one. An intelligent and enthusiastic group of players can extend it indefinitely. It’s all lawyering and deal making, even more than Diplomacy, it can continue for hours and hours, and you dare not leave the room for a second, lest all your carefully worked out dealmaking be washed away in an instant.