It is true that by playing games a person can improve his memory. The name of the most famous card game is also memory which is also called as concentration. Its all about remembering that which card has been placed, where all the cards are placed face down which needs to be turned over two at a instance by the player and if both of the cards are of same face then they are kept by the same player or if the cards are not of same face they are kept back and then the next player turns the card. Whosoever gets more number of cards wins the game. Since, more and more cards are turned as the games goes at higher level, player need to keep in mind about every card that which is placed where.
The best way to keep your memory sharp is to play first person shooting game where you need to remember that which enemy is where by playing the game again and again.
Playing games is same like closing your eyes and recalling about everything which you can out of the game. By playing new games the mind of the person also becomes sharper and the ability to remember lots of things.
So a good suggestion to everyone would be that play new games every day to keep your memory sharp.