UNO (Card Game)

UNO is a fast-paced tabletop card game based on matching colors and numbers, featuring special action cards that introduce strategic elements and resemble the game "Crazy 8s". Recommended for individuals aged 7 and above, it is typically played by 2 to 10 players. The primary objective is to be the first player to discard all cards from their hand and to be the first to reach a total of 500 points overall.

History

UNO was invented in 1971 by Merle Robbins, a barber from Reading, Ohio, United States. A disagreement with his son over the rules of "Crazy Eights" inspired him to create his own game with improved rules, laying the foundation for UNO. Since its market release, it has been widely played around the world for over 50 years. Today, the rights and distribution of the game are managed by Mattel.

Deck Structure and Contents

A classic UNO deck consists of 108 cards. However, since new action cards were added in 2018, some modern decks contain 112 cards. The card distribution is as follows:

UNO (Flickr)

• Numbered Cards: There are 76 cards numbered 0 to 9 in four colors: blue, green, red, and yellow (19 cards per color).
• Action Cards: The deck contains eight "Draw Two" cards, eight "Reverse" cards, and eight "Skip" cards, with two of each type per primary color.
• Joker Cards: There are four colorless "Wild" cards and four "Wild Draw Four" cards.
• New Joker Cards (for 112-card versions): Three additional cards have been added to the deck: "Wild Swap Hands", "Wild Shuffle Hands", and three "Wild Customizable" cards that allow players to write their own custom rules or actions.

Game Setup

Before the game begins, a dealer must be determined. Each player draws one card from the deck, and the player with the highest number becomes the dealer. In this phase, symbol (action) cards are considered to have a value of zero. If there is a tie, the tied players draw again until one draws a higher number.

The dealer shuffles the deck and deals seven cards face down to each player. The remaining cards are placed face down in the center of the table to form the "Draw Pile". The top card of the Draw Pile is turned face up and placed beside it to start the "Discard Pile". If the first revealed card is an action card, its effect is immediately applied to the first player. However, if the first card is a "Wild Draw Four", it is returned to the Draw Pile and a new card is revealed.

Basic Gameplay and Rules

The game typically begins with the player to the left of the dealer (or, in some versions, the youngest player) and proceeds clockwise. On their turn, a player must play a card from their hand that matches either the color, number, or symbol of the top card on the Discard Pile. For example, if the top card is a red 7, the player may play any red card or any 7 regardless of color. Alternatively, the player may choose to play any "Wild" card.

If a player has no matching card, they must draw one card from the Draw Pile. If the drawn card matches the top card of the Discard Pile, the player may choose to play it immediately during the same turn. Even if a player has a matching card, they may choose not to play it; in this case, they must still draw a card from the Draw Pile, and only the newly drawn card (if compatible) may be played during that turn.

"UNO" Rule

When a player has only one card left in their hand (after playing their second-to-last card), they must announce "UNO" to alert the other players. If the player forgets to say "UNO" and another player notices and calls out "UNO" before the next player takes their turn, the player who forgot must draw two cards as a penalty (or four cards in some versions). When the Draw Pile is exhausted, the Discard Pile is shuffled, leaving only the top card face up, and becomes the new Draw Pile.

Special Action Cards

These cards directly influence the flow of the game and are tied to color or symbol. Their functions are as follows:

UNO (Flickr)

• Skip: When played, this card skips the next player's turn. In two-player games, playing a Skip card grants the current player an additional turn.
• Reverse: This card reverses the direction of play. If the game was proceeding clockwise, it now proceeds counterclockwise. In two-player games, it functions like a Skip card, causing the opponent to lose their turn.
• Draw Two: The next player loses their turn and must draw two cards from the Draw Pile as a penalty.
• Wild: The player who plays this card chooses the color that continues play. It can be played at any time, even if the player holds a matching color card.
• Wild Draw Four: This card allows the player to choose the next color and forces the next player to draw four cards and lose their turn. However, there is a restriction: the player may only play this card if they have no cards matching the current color on the Discard Pile. If the next player suspects this rule has been broken, they may issue a "challenge". The player who played the Wild Draw Four must show their hand. If the challenge is valid, the player who played the card draws four cards instead. If the challenge is invalid, the challenger must draw four cards plus two additional penalty cards (six total).
• Wild Swap Hands: This single card allows the player to exchange all cards in their hand with those of any other player.
• Wild Shuffle Hands: All cards from every player’s hand are collected, shuffled together, and then redistributed evenly, starting with the next player.
• Wild Customizable: Three blank Joker cards on which players may write their own custom actions or rules, such as singing a song or doing push-ups.

Scoring and Winning Conditions

The player who wins a round (by discarding all their cards) scores points equal to the total value of all cards remaining in the other players’ hands. If the final card played is a "Draw Two" or "Wild Draw Four", the next player must draw the penalty cards before scoring. Rounds continue until a player reaches 500 points. Card values are calculated as follows:

• Numbered Cards (0–9): Worth their face value.
• Draw Two, Reverse, Skip: Each worth 20 points.
• Wild and Wild Draw Four: Each worth 50 points. (In some rule variants, Wild Swap Hands and Wild Customizable cards are worth 40 points each.)

In an alternative scoring system, players record the total value of cards remaining in their own hands as negative points or elimination points after each round. Any player who reaches 500 points is eliminated, and the last player remaining at the table is declared the winner.

Popular House Rules and Alternative Play Styles

Numerous "House Rules" and game variations have developed through informal agreement among players, often modifying the official rules:

• Progressive UNO / Stacking: If a player is forced to draw two cards, they may play a "Draw Two" from their own hand to pass the penalty on to the next player, stacking the total (e.g., two + two = four). The same stacking rule applies to "Wild Draw Four", which can be stacked to require eight cards to be drawn.
• Jump-in / Fast Play: If a player holds a card that exactly matches the color and number (or symbol) of the top card on the Discard Pile, they may play it immediately without waiting for their turn. The turn then passes to the player after the one whose turn was skipped.
• Seven-O Rule: When a zero card is played, all players must pass their entire hands to the next player in the direction of play. When a seven card is played, the player may swap hands with any other player of their choice.
• UNO War / Rummy / Race: Unofficial variants include "UNO Rummy" (building sets such as three 4s or color sequences), "UNO War" (simultaneous card draws), and "UNO Race" (team-based cooperative play to quickly discard cards).

Official Game Variations

Mattel has released numerous themed and mechanically altered versions of UNO over the years. These include mechanical variants such as UNO Attack, UNO Flip, UNO All Wild, UNO Flex, UNO Show 'Em No Mercy, UNO Spin, UNO Stacko, and UNO Blast, which retain the core gameplay while adding new mechanics, as well as themed pop culture versions such as UNO Harry Potter, UNO Minecraft, and UNO Super Mario. All these variations maintain the central rule: the first player to discard all their cards must say "UNO" to win.