
There's also a time limit for each person to do something, and a time limit on each game as well, while certain cards can cause the next player to lose their turn or have to draw two cards. If you still don't have a card that works that round, you have to take one from the pile of stacked, unrevealed cards.

You can also get cards that change the color the next player needs, or reverse the direction of who plays a card next. For those who've never played the physical version, UNO! is a card game where you have to get rid of all of your cards by matching the number or color of the card that was last tossed onto a pile. Though this does a good job of recreating the classic card game, it doesn't do a good job of making you feel like you're playing this game with friends or family.
