UNO is a fast-paced card game where players compete to be the first to empty their hands by matching cards to the discard pile by color, number, or symbol. Each player starts with 7 cards , and on their turn, they must either play a matching card, use a special Action card—such as a Skip, Reverse, or Draw Two to disrupt opponents—or draw a card from the deck if they cannot make a move. The most critical rule requires players to loudly yell "UNO!" when they have only one card left in their hand; failing to do so before the next turn begins results in a two-card penalty if caught by an opponent. A round ends when a player successfully discards their final card, earning points based on the cards remaining in their opponents' hands, with the first player to accumulate 500 points across multiple rounds declared the official winner.