Rat-a-Tat Cat is a memory card game designed by Monty and Ann Stambler[1] and published by Gamewright.
Alternatively, all players may choose to flip their outermost cards face-up.
Since cards are left face-down, memory is a very important part of this game.
They may play for an agreed-upon length of time or number of rounds, after which the player with the fewest points total wins the game.
The game may also be played such that when a player exceeds a certain points total, either the game ends immediately and the winner for the fewest points total is declared or that player is eliminated and the game continues until one player remains and is declared the winner.