fish, from BSD games lets one play the game of Go Fish.
Your hand is: A A 4 6 8 8 10 10 Q K You ask me for: Q I say "GO FISH!" You drew 6. I ask you for: 4. You have 1 4. I get another guess! I ask you for: 5. You say "GO FISH!"
Your hand is: A A 6 6 8 8 10 10 Q K You ask me for: k I have 1 K. You get another guess! [...]
When the game starts, you get an option to see the rules if you do not already know the game. You start with a number of cards, and the object of the game is to get the most 'books', that is, collections of four cards of the same value (such as 5,5,5,5).
The user will ask the computer for a card on her own hand, if the computer has one or more, he will have to give them to the user, and the user gets another guess.
If the computer does not have the card, it will say "GO FISH!", and the user will draw a card and add to her hand. If the card the user draws happens to be the one she asked for, she will get a bonus turn, otherwise it's the computer's turn to ask.
When a player gets four cards of the same value, he or she has scored a book, and can put them on the table. The game continues until one player runs out of card, the books are then counted, and the player with the most books is declared the winner.
This is an excellent game to play while fsck is running.