UNO No Mercy Rules The Complete Guide
Every card, every special effect, every edge case. The complete rule set for UNO No Mercy - the ruthless expansion that turned every UNO night into a battlefield.
UNO No Mercy rule book: the one-screen summary
Every rule in the game, in the order you meet it. Each row links to the full section below.
| Rule | Summary |
|---|---|
| Players | 2 to 20. Best with 3 to 6. |
| Deck | 168 cards: the classic 108 plus 60 No Mercy cards. |
| Deal | 7 cards each. The next card starts the discard pile. |
| Goal | Empty your hand first, or be the last player not eliminated. |
| Your turn | Play one card matching the top card by color, number or symbol. Wilds go on anything. |
| Can't play | Draw until you can, then play it. House rule: draw one card. |
| Draw stacking | Answer a Draw card with one of equal or higher value to pass the total on. Can't stack: draw the whole total. |
| Mercy rule | Reach 25 cards at any moment and you are eliminated. |
| UNO call | Call "UNO!" when you go down to one card. Forgetting costs you cards. |
| Scoring | Numbers at face value, action cards 20, Wilds 50, plus 250 for each player you eliminated. |
New to the game? How to play UNO No Mercy walks through a round step by step.
Printing for game night? The one-page cheat sheet has every rule and all 168 cards on a single sheet, with a PDF download.
What is UNO No Mercy?
UNO No Mercy is an official rule expansion released by Mattel that takes the chaos of classic UNO and amplifies it. New cards force opponents to draw 6, 10, or even more cards. Players who hold 25+ cards are eliminated from the round entirely. Draw cards stack on top of each other, building penalties that can wipe a player out in a single turn.
It's UNO with the safety rails removed. One bad turn and you're holding half the deck. Two bad turns and you're out.
This page covers every official rule, plus common variants you might play with friends.
Setup & Goal
Players
2 to 20 players. Best with 3-6.
Deck
The No Mercy deck has 168 cards total - the classic 108 UNO cards plus 60 new "No Mercy" cards.
Goal
Be the last player standing. You win by either:
- Emptying your hand first, or
- Surviving while every other player is eliminated by the mercy rule.
Deal
Each player is dealt 7 cards. The next card is placed face-up as the starting discard. The rest forms the draw pile.
First Card
If the first flipped card is a special card, it takes effect immediately:
- Skip - the first player is skipped.
- Reverse - reverses turn order (in 2-player games, acts as Skip).
- Draw 2 / Draw 4 - the first player must draw and is skipped.
- Skip Everyone - dealer plays again.
Basic Play
On your turn, play one card that matches the top discard by color, number, or symbol. Wild cards can be played on any color.
If you can't play, draw cards from the deck until you draw a playable one - then you must play it immediately.
All Cards & Effects
The No Mercy deck includes every classic UNO card plus seven new card types. Here's what each one does.
Classic UNO Cards
| Card | Effect |
|---|---|
| Number (0-9) | Match by color or number. The 0 and 7 have special No Mercy effects (see below). |
| Skip | Next player loses their turn. |
| Reverse | Reverses turn direction. In 2-player games, acts as a Skip. |
| Draw 2 (+2) | Next player draws 2 cards and loses their turn (unless stacked). |
| Wild | Play on any color. The player who plays it chooses the next color. |
| Draw 4 (+4) | Next player draws 4 and loses their turn (unless stacked). In No Mercy this one is colored, so it follows normal color matching. |
No Mercy Cards
| Card | Effect |
|---|---|
| Draw 6 (+6) | Next player draws 6 cards. Stackable with other draw cards. |
| Draw 10 (+10) | Next player draws 10 cards. The most devastating single card in the game. Draw 10 in depth |
| Skip Everyone | All other players are skipped. You play again on the same turn. Skip Everyone in depth |
| Discard All | Discard every card of the matching color from your hand at once. You choose which card stays on top of the pile (the next player must match that one). Discard All in depth |
| 7 - Swap | When you play a 7, you may swap your entire hand with another player. In our online version, you can also choose to keep your own hand. The 7 and 0 rule in depth |
| 0 - Rotate | When you play a 0, every player's hand rotates one seat in the current play direction. How the rotation works |
| Wild Reverse Draw 4 | Wild + Draw 4 + reverses direction. In 2-player games, the +4 goes to your opponent (we follow this rule; some house rules send it back to you). |
| Wild Color Roulette | The next player calls a color, then must draw from the deck until they hit it. Can be 1 card. Can be 15. Wild cards drawn during roulette do not count - they keep drawing. Color Roulette in depth |
Draw Stacking Rules
Stacking is the most-debated rule in UNO No Mercy. When a Draw card is played, the next player can sometimes "stack" their own Draw card on top, passing the accumulated penalty to the player after them. Three common rule variants exist:
Official Rule (Equal or Higher)
A Draw card can only be stacked if its value is equal to or higher than the top card. So a +4 cannot go on a +10, but a +10 can go on a +6.
This is the printed rule and the default we use. It rewards holding higher-value Draw cards.
House Rule (Wild Cards Stack on Anything)
Wild Draw cards (Wild Reverse Draw 4, Wild Draw 6, Wild Draw 10) can stack on any Draw card regardless of value. Colored Draw cards still follow the equal-or-higher rule. This is one of the most common house rules.
Casual Rule (Anything Goes)
Any Draw card stacks on any Draw card. A +2 can go on a +10. The game becomes more chaotic and luck-based.
What Happens When You Can't Stack
If you don't have a stackable Draw card, you must draw the full accumulated penalty. So if a +10 was played and then a +6 was stacked on it, the next player who can't continue stacking draws all 16 cards.
The Mercy Rule (Elimination at 25 Cards)
This is the most defining rule of No Mercy. Drawing penalties can pile up fast - a +10 followed by another +10 is enough to push a 6-card hand over the line.
The mercy rule applies at any moment during play. If you're forced to draw cards (from a Draw stack, a Roulette, or normal drawing) and your hand crosses 25, elimination is immediate.
If all but one player is eliminated, the surviving player wins the round - even if their hand isn't empty.
Deeper dive: The mercy rule, explained covers exactly when the count is checked, what happens to your cards, and how to stay under 25.
UNO Call & Penalty
When you play your second-to-last card (going from 2 cards to 1), you must call "UNO!" before the next player takes their turn.
In our online game, Open Mercy, the call button says MERCY! - same rule, same timing.
In Open Mercy, forgetting costs you in one of two ways. Sit on 1 card without calling and every opponent gets a CAUGHT button for a few seconds - if anyone presses it, you draw 10 cards. If nobody catches you in time, playing your last card still wins.
Scoring
When a round ends, the winner scores points based on the cards left in opponents' hands:
- Number cards (0-9): face value
- Action cards (Skip, Reverse, Draw 2, etc.): 20 points each
- Wild cards: 50 points each
- Eliminated player bonus: 250 points to the winner for each player eliminated by the mercy rule
Multi-round games typically play to a target score (500 or 1000).
2-Player Variants
Some rules change when only two players are at the table:
- Reverse acts as a Skip.
- Wild Reverse Draw 4: we send the +4 penalty to your opponent (since reverse skips them in 2-player, this is the cleanest read). Some house rules send the +4 back to you instead - decide before play.
- 0 - Rotate is essentially a hand swap.
- 7 - Swap only has one possible target.
Strategy Tips
Hold Your High-Value Draws
A +10 in hand is insurance. If someone plays a Draw chain, you're the only one who can stack on top - or at least force them to absorb it. Don't waste your +10 on an opening play.
Time Your Skip Everyone
The Skip Everyone is most valuable when you're about to call UNO. Playing it as your second-to-last card lets you slip in your final card before anyone else can react.
Color Roulette is a Gamble Both Ways
Roulette can be devastating, but the victim controls the spin. When you're hit, call smart: the deck is finite, so if most of a color is already in hands or on the discard pile, calling it means a long, painful draw. Call the color you've seen the least of.
Track Card Counts
In No Mercy, knowing who's close to elimination matters more than in regular UNO. If a player has 20+ cards, push them to elimination with Draw cards or Color Roulette before they can recover.
The 7 Card is a Defensive Tool
If your hand is bloated, a 7 can save you - swap with whoever has the smallest hand. The player you swap with may end up close to mercy elimination on their next turn.
Frequently Asked Questions
168. That is 76 number cards, 72 colored action cards (Skip, Reverse, Draw 2, Draw 4, Skip Everyone and Discard All), 4 plain Wilds and 16 special Wilds (Wild Reverse Draw 4, Draw 6, Draw 10 and Color Roulette). It is the classic 108-card deck plus 60 new cards. Every card, explained.
Deal 7 cards each and take turns matching the top card by color, number or symbol. Draw cards can be stacked on each other, anyone who reaches 25 cards is eliminated, and the first player to empty their hand, or the last one left, wins. The step-by-step guide.
7, the same as classic UNO. The next card from the deck starts the discard pile.
If your hand reaches 25 cards at any point, you are eliminated from the round. If everyone else is eliminated, the last player left wins, even with cards in hand.
The official printed rules ship with the game. This page is an independent, complete version: the one-screen summary at the top, then every card, stacking variant and edge case, all checked against a working game engine.
You can play the variant rules (mercy, 7-swap, 0-rotate) with a regular deck, but you won't have the special cards (Draw 6, Draw 10, Skip Everyone, etc.). It's a watered-down version. Full breakdown of what you keep and lose, with workarounds.
Shuffle the discard pile (except the top card) and use it as the new deck. The penalty continues - if the player only got 4 cards out of a +6 penalty before the deck ran out, they draw the remaining 2 after the reshuffle.
Only Wild cards with a draw value can continue a Draw stack: Wild Reverse Draw 4, Wild Draw 6 and Wild Draw 10, subject to your stacking variant. A plain Wild has no draw value, so it can't be played on a stack.
In the printed rules, yes. In our online version, the player can choose to "keep my hand" instead of swapping. This avoids the awkwardness of being forced into a swap when no opponent has fewer cards.
You're immediately eliminated. The cards you drew that pushed you over count - you don't stop at 24.
Yes - open-mercy.com is a free browser game built on this ruleset, with real-time multiplayer (2-20 players) and a solo vs AI mode. No download, no login required.