it's your turn, it's your go / it's up to you now

to play big, to play for high stakes

to play the game, to play by the rules, to observe the rules of the game / to play along, to play ball

(derogatory) to play it safe

to argue semantics, to play on semantics, to quibble, to deliberately misinterpret someone's words

(games) to play the decider, to play a tiebreaker

(figuratively) to play the … card

(figuratively) to play the field, to play several sides at once, to keep plates spinning (especially in a romantic context)

(figuratively) to play it straight, to play fair [+ avec (object) = with (someone)]

to play doctor (to pretend to be doctor and patient as a form of child play) / to play doctor (to engage in sexual role-play of a medical nature)