From The Makers Of Uno DOS Card Game Keep yourself entertained for hours with this DOS Card Game. The DOS card game is just like UNO, where players are involved in a frantic run to be the first to get rid of their cards. The players of the game have two discard piles each, and can put both the cards down when they have two cards that sums up to the corresponding number to the card from the center pile. When your play leads you to have two cards in hand, don't forget to yell DOS! This exciting card game is perfect for the whole fam. Card games have never been this fun!