From Longman Dictionary of Contemporary Englishbe a gamebe a gamePRETENDto be something that you do to enjoy yourself rather than for a serious purposeIt’s just a game to them. They don’t care what happens. →game
Examples from the Corpus
be a game• Ballesteros's game was in trouble.• But golfis a game of momentum.• Collegefootball is as much a beautycontest as it is a game.• Perhaps a bit miscast, and with a penchant for too many double-takes, Perry none the less is game.• Before, every time there was games they would kick her and everything.• There were games with a prize for everyone.• This was a game she couldn't win.• It used to be a game, and Jeff loved it.