Tipping point card game 🃏
Sandra wished for card games with a tipping point
I'm not sure if this fits the bill completely, but I like the game German Whist. Wikipedia says it's probably not German, but whatever.
There are two players, and you deal hands - Wikipedia says 13 cards, but I always played 7. Then you turn up the first of the remaining cards. This suit is trumps. You play for tricks, and each time the winner takes the face-up card, the loser takes the face-down card, and you turn another card up. So in phase one, you want to win the good face-up cards, not the dross, but you also don't want your trick total to fall too far behind. The tipping point is when there are no more cards to turn up, and you're just trying to annihilate your opponent with your big cards.
There's skill in getting the balance right between taking tricks and building your hand, and also an element of luck in what you get when you lose a trick and take a face-down card.
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