Note: This is an import game in German.  English Rules can be found here.

Stop is a variation of Uno, with players trying to empty their hand of cards by playing onto a discard pile by matching the color or number of the card on top of the pile. Stop also includes a few special cards and rules to tweak the gameplay and differentiate it:

• 6s and 9s are considered to be identical, so a 6 can be played on a 9 regardless of the color and vice versa.
• If a player has a number card identical in color to the top card, she may play it out of turn onto the discard stack.
• An exchange card allows the player playing it to have everyone give their cards to their left- or right-hand neighbor.
• The +X card forces the next player to draw the top card of the deck and add it to her hand. If it's a number card, she must also draw that many cards.
• The +2 card forces the next player to draw two cards and skip her turn – unless she also plays a +2 in which case the next player must draw four cards, etc.
• A skip card skips the next player.
• A stop card, which is numbered 0, can prevent the action of an exchange, +X, +2 or skip card played by the previous player.

When a player runs out of cards, the other players score points based on the cards they still have in hand. After multiple rounds, the game ends if a player has 500 or more points; the player with the fewest points wins!