You start with seven cards and try to get rid of them as fast as possible. If a player has discarded all of his cards, the remaining players count the points in their hand. When a player reaches the agreed maximum score, the player with the lowest score wins.
If you can't, or don't want to play a card, you draw one from the deck. There are four colours with numbers from 1 to 9. You can either play colour on colour or number on number.
But there are also a lot of special cards. For example, have someone draw four cards from the deck, or give a fellow player two cards out of your hand. And the fun part: You always get to choose, whom you give these cards to!
Now, we come to the black cards, also with numbers from 1 to 9. You can only play these on a number, not on the same colour. Every time, a black card is being played, it activates an event card.
These event cards go from Friday, the Thirteenth - where nothing happens – to Tornado – where all hand cards get shuffled together and handed out again.