- BGG rank
- BGG #7,676
- BGG rating
- 6.1
UNO: Show 'Em No Mercy
- 2–6 players
- 15–30 min
- Complexity 1.4/5
- 2023
- BGG rating
- 6.5
Rules assistance for UNO: Add-On Packs! – Stack Pack
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.
- 2–10 players
- 15–45 min
- 7+
Rules assistant for UNO: Add-On Packs! – Stack Pack
What would you like to know?
Answers come from the official rulebook, with the page to check.
UNO: Add-On Packs! – Stack Pack is an expansion for UNO released in 2025 for 2–10 players, 15–45 minutes per game, and ages 7 and up. It was designed by Nick Hayes and its main mechanics are Hand Management, Take That, and Matching.
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About the game
UNO: Stack Pack Add-On of 16 cards enhances the classic UNO card game by adding stackable draw penalties that increase the game's intensity. Players can use Stack 1 and Stack 2 cards to force the next player to draw one or two cards, respectively, while losing their turn. When responding to other draw cards (+2, +4), these Stack cards can escalate the penalty, making the next player draw even more cards. Wild Stack 3 cards allow players to choose the next color and impose a draw-three penalty on the following player. The unpredictable Wild Stack Number card dramatically heightens the tension by revealing the top number card from the draw pile to determine how many cards the next player must draw. This add-on adds strategic depth and can create significant turnarounds, keeping gameplay exciting. —description from the rulebook (adapted)
Mechanics
Designers
Publishers
- Mattel, Inc.
Questions and answers
UNO: Add-On Packs! – Stack Pack supports 2–10 players according to the catalogue. This range comes from the publisher’s listed player count, so the game can be set up for any group size within it. Some setups, rules and scoring details may still vary by player count, so check your edition’s rulebook for the exact configuration.
The listed playing time for UNO: Add-On Packs! – Stack Pack is 15–45 minutes. This is the publisher’s estimate for a full game. The actual duration depends on the group, the player count and familiarity with the rules: first sessions usually run longer, while experienced groups often finish faster. Setup and teaching time are not included in this estimate.
The catalogue lists UNO: Add-On Packs! – Stack Pack for ages 7 and up. This is the publisher’s recommendation and reflects reading demands, rule complexity and small components rather than theme alone. Younger players can often join with help from an adult, so check the age guidance on your edition and consider your group’s experience with board games.
UNO: Add-On Packs! – Stack Pack belongs to these categories: Card Game, Party Game, and Expansion for Base-game. Its main mechanics are Hand Management, Take That, and Matching. Categories describe the theme and setting of a game, while mechanics describe what players actually do on their turns. Each mechanic links to a catalogue hub with similar games, which helps when you want something comparable.
The credited designers of UNO: Add-On Packs! – Stack Pack are: Nick Hayes. These credits come from the published game data and name the people responsible for the game’s design, not its illustrators or publishers. Designer pages on MeepleRules collect other titles by the same designers, which helps when you enjoy a game and want to find similar ones.
The catalogue lists UNO: Add-On Packs! – Stack Pack as an expansion for UNO. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need UNO to use it. Check that your edition of UNO is compatible, as some expansions were revised between editions.