The basic rules of UNO Online follow the original game. The objective is to be the first player to score 500 points by getting rid of all the cards in your hand. The uno online game is played with a deck of 108 cards, including four color suits (red, blue, green, and yellow) and special action cards.

Game Setup and Rules
Starting the Game: Each player is dealt seven cards, and the game begins with a face-up card from the deck.
Matching Cards: Players must match the top card of the discard pile by color or number. If they cannot play a card, they must draw from the deck.
Special Cards:
Skip: Skips the next player's turn.
Reverse: Changes the direction of play.
Draw Two: Forces the next player to pick two cards and lose their turn.
Wild: Allows the player to choose any color.
Wild Draw Four: The most powerful card, letting a player pick a color and forcing an opponent to draw four cards.
Calling "UNO": When a player has one card left, they must declare "UNO." If another player catches them without saying it, they must draw two cards as a penalty.
Winning: A round ends when a player plays their last card. Points are awarded based on the value of remaining cards in opponents’ hands.