6 Nimmt! Family Card Game

 Nimmt! is also known as Category 5 and has many other names. The goal of the game is to score as few points as possible. To begin, the 104 number cards are shuffled and four cards are laid face-up to start the four rows. Each player is then dealt 10 cards. During their turn, players simultaneously choose and reveal a card from their hand, adding it to one of the rows. The cards in a row must be in ascending order, with the placed card being lower than the highest number in the row. If a player places the sixth card in a row, they take all other cards in that row and the sixth card starts a new row. 

In addition to a number from 1 to 104, each card has a point value. After finishing ten rounds, players tally their score and see whether the game ends. (Category 5 ends when a player has a score greater than 74, for example, while 6 nimmt! ends when someone tops 66.) When this happens, the player with the fewest points wins!

6 nimmt! works with 2-10 players, and the dynamics of gameplay change the more players that you have. One variant for the game has you use 34 cards, 44 cards, 54 cards, etc. (instead of all 104 cards) when you have three, four, five, etc. number of players. This change allows you to know which cards are in play, thereby allowing you to track which cards have been played and (theoretically) make better choices as to which card to play when.