at stake, on the line

(television) game show

fair play

(video games) arcade game

it will end in tears! stop fooling around! stop roughhousing! you'll poke an eye out! it's all fun and games till someone gets hurt! it's all fun and games until someone loses an eye! (used to admonish children who are bickering and fighting) / naughty! (used with sexual overtones)

playground / pitch, court (place where a sporting event takes place)

jeu de paume

card game / deck of cards, card deck

pun, play on words

(uncountable) draughts; checkers (game) / (countable) box containing checkers and a checkerboard