versions 2, 5, 6 and 7 are from chinadaily commuters who command excellent english, each being a good interpretation of the chinese idom. note, in all these bilinguists' translations, the word "world" doesn't appear. why?
btw, i have just got one more english version for it:
(ver 8) Once you're in the game, you'll have to play the rules.
... you have to play with it, at least for a while.
... you have to play. (you can't stop or swtich to another game.)
... you have to play. (it doesn't matter you like it or not.)