Vingt-et-un, more commonly known as Blackjack. Vingt-et-un (literally "Twenty-one") is thought to be the French name of the game before Blackjack became widely spread. (Also I just noticed I've been spelling it wrong in-game as vingt-en-un oops lol)
It was something like "Vengt-en-un"? I'm pretty sure it's just blackjack though
'course!