UNO Show 'Em No Mercy
168 cards, zero sympathy: stack the penalties, swap the hands, show no mercy.
The Story
Rule Twists vs. Classic UNO
Everything below is an official printed rule unless flagged otherwise.
Official stacking
Any Draw card (Draw 2, Draw 4, Draw 6, Draw 10) can be answered with another Draw card of equal or higher value from the responder's hand, passing the growing penalty down the line instead of resolving it immediately. The responder only ever needs to match the value of the last Draw card played, not the cumulative total.
The Mercy rule
If a player's hand ever reaches 25 or more cards, they are eliminated from the round immediately. Their hand is set aside (not reshuffled into the deck) until the draw pile needs replenishing. If elimination leaves one player standing, that player wins the hand outright.
Draw until you can play
If you have no playable card, you draw repeatedly from the draw pile until you draw one you can legally play, rather than drawing a single card and passing.
Widely used — not an official rule
Optional scoring values
CommunitySome published guides list Color Action Cards at 20 points and Wild Action Cards at 50 points for tournament-style scoring. This scoring table has circulated widely on rules sites but is presented as an optional/alternate scoring system rather than the core box rule, which is simply first-to-empty-hand.
Special Cards & Action Rules
Tap a card to reveal its exact ruling.
0 — Pass All Hands one per color, numbered 0 · 8 in deck
When played, every player at the table passes their entire hand to the next player in the current direction of play.
7 — Swap Hands one per color, numbered 7 · 8 in deck
The player who plays a 7 must swap their entire hand with one opponent of their choice. The swap is mandatory, not optional.
Draw 2 one per color · 12 in deck
Next player draws 2 and loses their turn, unless they stack a Draw 2 or higher.
Draw 4 (colored) one per color · 8 in deck
Next player draws 4 and loses their turn, unless they stack a Draw 4 or higher. Distinct from the colorless Wild Reverse Draw 4.
Skip one per color · 12 in deck
Next player loses their turn.
Skip Everyone one per color · 8 in deck
Every other player is skipped; the card's player takes another turn immediately.
Reverse one per color · 12 in deck
Reverses the direction of play.
Discard All one per color · 12 in deck
The player discards every remaining card in their hand of the same color as the card played, in one turn.
Wild Reverse Draw 4 colorless · 8 in deck
Reverses play direction and forces the next player (now in the new direction) to draw 4 or stack. In a 2-player game its Reverse effect returns it to the original player, who can still stack on themself.
Wild Draw 6 colorless · 4 in deck
Next player draws 6 and loses their turn, unless they stack a Draw 6 or Draw 10.
Wild Draw 10 colorless · 4 in deck
Next player draws 10 and loses their turn. Can only be stacked with another Wild Draw 10.
Wild Color Roulette colorless · 4 in deck
The player names a color. The next player reveals cards one at a time from the draw pile into their hand until the first card of the named color appears (wild-type Draw cards revealed along the way do not count as satisfying the color).