The game is extremely popular, spurring literally hundreds of spinoffs from “American Kennel Club Uno” to “X-Men Uno.” By applying the SVU model (Simplicity, Variability, and Uniqueness), we can understand what makes this game so successful and learn how to take your own spin on Custom Uno Cards. Uno is a game that centers around being the first player to shed your hand in order to win – as long as you remember to yell the titular “UNO!” when you’re down to one card.