Tonk Offline, also known as Tunk is a kind of knock Rummy or variation of Gin Rummy. Tonk Offline a standard 52 card deck is used, without jokers. Tonk Offline is best for two or three players. A standard 52 card deck is used, without jokers. 

The cards have values as follows: picture cards count 10 points, aces count 1 point and other cards count face value. Five cards are dealt to each player, clockwise, one at a time. The next card is placed face up on the table to start the discard pile, and the remaining undealt cards are placed face down in a stack beside the discard pile to form the stock.

Any player whose initial hand contains 49 or 50 points must declare this immediately and show their cards: this is sometimes known as a "tonk".