When a player plays a Uno 4 card in a game of Uno, they can choose any opponent to draw four additional cards and skip their turn.
When a player plays a blue Uno skip card during a game, the next player in turn is skipped and loses their chance to play a card.
When a player plays a red skip Uno card during a game, the next player in turn is skipped and loses their chance to play a card.
When a player plays the "Uno Change Color" card in Uno, they get to choose a new color for the game to continue with.
When a player plays the Uno Swap Hands card as their last card, they must swap their hand with another player of their choice before declaring "Uno" to win the game.
When a player plays a Uno Wild Reverse card during a game, the direction of play is reversed, meaning the order in which players take turns is changed.
When a player plays the wild reverse card in Uno, the direction of play is reversed, meaning the order of turns changes to the opposite direction.
When someone plays a wild Uno reverse card during a game, the direction of play is reversed, and the next player must play in the opposite direction.
When a player plays a Wild Draw 4 card in Uno, they get to choose the color that play continues in, and the next player must draw four cards from the deck and skip their turn.
When a player in UNO plays their last card and activates the "Swap Hands" rule, they must swap their hand with another player of their choice before the game ends. This can potentially change the outcome of the game and add an element of surprise.
When a player plays a reverse card in Uno, the direction of play is reversed, meaning the order of turns is switched. For example, if the game was going clockwise, it would then switch to going counterclockwise.
When a player plays the Uno Flip card that triggers a color change in the game, the current color being played changes to the new color indicated on the card. This means that all players must now match their cards to the new color in order to continue playing.
When a player uses the Uno Skip card during a game, the next player in turn is skipped and loses their chance to play a card.