The deck consists of 86 cards, with two cards each numbered 1-10 in four suits, along with three 11s, two 12s, and one 13. Each player starts with a hand of thirteen cards. The leader of the round plays a combination of 1-5 cards, then each subsequent player can play the same number of cards but of a higher value or pass. Once all but one person has passed, the cards are cleared from the table, then the last player to play leads something else.
Once per round, when you pass, you can rage, placing your rage card on a card that's currently on the table. When these cards are cleared, you can place the claimed card in your hand.
Note that a "Rainbow Bomb" — four consecutive cards with each suit represented — can be played on your turn no matter what's currently being played, and this can be beaten only by a higher Rainbow Bomb.
When one played voids their hand, the round ends. Everyone with cards in hand then scores 1-3 points per card based on how many they have, then you shuffle for a new round unless the weekend is here.