How many cards are in an UNO No Mercy deck?

168 cards: 76 number cards, 72 colored action cards, and 20 wild cards. A classic UNO deck has 108.

What does the Skip Everyone card do?

Every other player is skipped and the turn returns to you, so you play again immediately. In a two-player game it behaves like a normal Skip.

What does Discard All do?

You discard every card of that color from your hand at once. The card you place on top still applies its own effect, so a Discard All dump can end with a draw card landing on the next player.

What does the 0 card do in No Mercy?

All hands rotate to the next player in the current direction of play. Reversing direction before playing a 0 changes which way the hands move.

Every Card, Explained All 168 of Them

What each card actually does, how many of it exist in the deck, and the interactions that catch people out. Counts below are the exact deck composition we deal.

UNO® and UNO Show 'Em No Mercy® are trademarks of Mattel, Inc. This is an independent reference. Open Mercy is our free browser game built on this ruleset, not affiliated with or endorsed by Mattel.

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Deck composition
Number cards (and the two weird ones)
Colored action cards
Wild cards
Interactions worth knowing

Deck composition

168 cards against a classic deck's 108. The extra 60 are what make hands spiral.

Group	Cards	Count
Number cards	0 once per color, 1–9 twice per color	76
Colored actions	Skip, Reverse, Draw 2, Draw 4, Skip Everyone, Discard All — three of each, per color	72
Plain Wild	Choose a color, no penalty	4
Special Wilds	Wild Reverse Draw 4, Draw 6, Draw 10, Color Roulette — four of each	16
Total		168

Draw 4 is a colored card here. In classic UNO the Draw 4 is always wild. In No Mercy there is a colored Draw 4 in each suit and a Wild Reverse Draw 4. That is why +4s appear so much more often.

Number cards (and the two weird ones)

Most numbers are inert — match color or value and move on. Two are not.

0 — Rotate all hands

Every player passes their entire hand to the next player in the current direction of play. Four of these exist, one per color.

Direction matters. Play a Reverse first and the hands travel the other way. If the player about to receive your 22-card disaster is upstream, flip direction before dumping it.

7 — Swap hands

Play a 7 and choose any opponent to swap entire hands with. Eight exist — two per color.

The single best comeback card. Nothing else in the deck turns a losing hand into a winning one in one move. Hold one when you are drowning, and watch whoever is down to two cards.

Colored action cards

Three of each, in each of the four colors — twelve copies of every type.

Card	Effect	In deck
Skip	Next player loses their turn. In a two-player game, you play again.	12
Reverse	Flips direction. With two players it acts as a Skip.	12
Draw 2 (+2)	Next player draws 2, unless they stack.	12
Draw 4 (+4)	Next player draws 4. Colored, so it must match color to be played — no challenge rule.	12
Skip Everyone	All other players are skipped; the turn returns to you.	12
Discard All	Discard every card of that color from your hand at once.	12

Skip Everyone, in practice

You play again immediately. Two in a row is a free double-turn, and chaining one into a Discard All is the fastest legal way to empty a hand. With only two players it is just a Skip.

Discard All, in practice

Every card of that color leaves your hand at once. The important part people miss: the card you place on top still fires its own effect. If your red pile contains a red Draw 4, you can finish the dump with that on top and the next player faces a +4. When several of your cards could go on top, you get to choose which.

It can win the round outright. If a Discard All empties your hand, you win — and you do not need to have made the last-card call first, because there was never a moment where you held exactly one card.

Wild cards

Twenty in total. Playable on anything (subject to stacking rules when a draw stack is live).

Card	Effect	In deck
Wild	Choose the color. No penalty.	4
Wild Reverse Draw 4	Next player draws 4 and direction flips.	4
Draw 6 (+6)	Next player draws 6.	4
Draw 10 (+10)	Next player draws 10. The deck's heaviest single hit.	4
Color Roulette	Choose a color; the next player draws until they hit it.	4

Color Roulette has no fixed cost — and no draw value. Its victim might draw two cards or fifteen; there is no cap short of the deck running out. Because it carries no draw value it can neither be played onto an active draw stack nor be stacked upon. It is the one card whose damage you genuinely cannot predict, and the fastest route to a 25-card elimination.

Wild Reverse Draw 4 is worth more than its +4. Flipping direction sends an accumulating stack back where it came from. Its stacking value is 4 though, so it cannot answer a +6 or +10 — see the stacking guide.

Interactions worth knowing

Does the top card of a Discard All apply its effect?

Yes, and you choose which of your matching cards goes on top. Finishing on a draw card passes a penalty along; finishing on a Skip Everyone gives you another turn.

Can Color Roulette be played onto a draw stack?

No. It has no draw value, so it can't join a stack, and nothing can be stacked onto it either.

Do I call the last-card warning if a 7 swap leaves me on one card?

Yes. However your hand reached one card, the call applies. In Open Mercy the button reads MERCY!

What happens if the draw pile runs out mid-penalty?

The discard pile is reshuffled (minus its top card) and the draw continues. If there genuinely aren't enough cards left, a Color Roulette that can never resolve simply ends — the victim keeps what they drew and play moves on.

Which card is most dangerous to hold?

None of them — holding cards is the danger. Elimination triggers at 25 cards, so every card you keep for a future combo is a step toward the limit.

More guides: Stacking rules · Playing with a regular deck · Full rules

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