Mattel's UNO Stacko (item JGT89, the 2025 box), the box our link goes toPhoto: Mattel
What's in the box: 45 blocks, stacked three by threePhoto: Mattel
Pull a block that matches the last one, then stack it on topPhoto: Mattel
Whoever knocks the tower down losesPhoto: Mattel
The back of the North American boxPhoto: Mattel
Video

Party game

UNO Stacko

Pull matching UNO blocks, stack them on top, don't topple the tower

2–10players · best with 3-6
10–20 minplaying time
7+recommended age
Learning curve
Very easy1 / 5
EasyDemanding
Luck & skill
Luck and skill
LuckSkill
Interaction
Medium
Set-up
About 3 min
Reading
None

The quick verdict

Full verdict ↓

Great for Mixed-age families: children of 7 and up can match colours while the adults worry about the wobble

Think twice if You want a quiet game: the tower crashes loudly onto the table

How we rate it

Learning curve. If you know Jenga and UNO, there's almost nothing new to learn. The only rules to remember are what each action block does.

Luck & skill. A steady hand matters most, but the colour or number you're forced to pull, and how the tower happens to sit, bring plenty of luck.

Interaction. Each block you pull decides what the next player must match, and Draw Two and Skip blocks hit the next player directly.

Set-up. Shuffle the blocks and build the tower in layers of three, crossing each layer, then straighten it with the loading tray.

Reading. Blocks carry colours, numbers and symbols only; the rule sheet is the only text.

Learning curve: 1 = UNO or Connect 4; 3 = Catan; 5 = a heavy strategy game. These describe the experience, not an overall score.

Is UNO Stacko right for you?

Great if

  • Mixed-age families: children of 7 and up can match colours while the adults worry about the wobble
  • Big groups at a get-together: up to 10 can play
  • Jenga fans who want a rule that decides which block they may pull
  • A cheerful gift for an UNO-loving child

Skip it if

  • You want a quiet game: the tower crashes loudly onto the table
  • You only have a soft or wobbly surface to play on
  • You want a game with lots of decisions: it is mostly steady hands and luck

How UNO Stacko plays

One player builds the tower: stack the 45 blocks in layers of three, each layer at right angles to the one below, and use the loading tray to push the tower straight. The tray also helps you load the blocks back into the box afterwards.

  • Time to teach: about 5 minutes (less if you know Jenga and UNO).
  • Reading and language: The blocks carry colours, numbers and action symbols only. Mattel's rule sheet is the only text, and the rules are easy to explain in any language.
Pull a block that matches the last one, then stack it on top · Photo: Mattel

UNO Stacko - How to Play · Cardboard Crash Course

Choose a video · Watch right here

If this creator doesn’t allow embedded playback, watch on YouTube ↗.

A turn, step by step

  1. 1
    Pull

    With one hand, pull a block from below the top layer that matches the last block by colour or number.

  2. 2
    Stack

    Place it on top of the tower, finishing each layer of three before starting a new one crosswise.

  3. 3
    Act

    Pulled an action block? Reverse, Skip or Draw Two changes who goes next or makes the next player pull two.

  4. 4
    Win

    Whoever knocks the tower down loses; the last player to stack a block safely wins.

Read the official rules (PDF)UNO Stacko instruction sheet (Mattel item 43535, earlier box) · English and French
The full explanation: how a game of UNO Stacko goes

The first player pulls any block from below the top completed layer, using one hand, and places it on top; once the top layer has three blocks, start a new layer crosswise. From then on, each player must pull a block that matches the last one placed. Mattel's older rule sheet says by colour or number; its description of this 2025 box says colour, number or symbol.

Action blocks work like UNO's action cards. Reverse turns the order of play round, Skip makes the next player miss a turn, and Draw Two makes the next player pull and stack two blocks of that colour. In Mattel's earlier boxes, a Wild block let you name the colour the next player must pull. With only two players, a Reverse or Skip counts as a Draw Two.

Only one hand may touch the tower at a time. You may test blocks for looseness but must put them back. If someone uses both hands, any player can call 'UNO!', and the offender must pull two blocks of a colour the caller chooses. Whoever makes the tower fall loses, and the last player to pull and stack a block safely wins.

How it differs from classic UNO: there are no cards and no hands to empty. UNO's colours, numbers and action symbols only decide which block you are allowed to pull, so a steady hand matters as much as luck. Tip: when you're forced to pull an awkward colour, gently test a few blocks with one finger before you commit.

What's in the box

What's in the box: 45 blocks, stacked three by three · Photo: Mattel
  • 45Blocks
    coloured blocks printed with UNO-style numbers and action symbols
  • 1Loading tray
    straightens the tower and helps load the blocks back into the box
  • 1Instruction sheet

Contents as Mattel lists them for item JGT89: 45 blocks and a loading tray (the Amazon.in listing adds instructions). Mattel gives no breakdown by colour or symbol. Mattel's earlier sheet (item 43535) also lists 45 blocks, including Wild, Reverse, Skip and Draw Two action blocks; whether the 2025 box still has Wild blocks wasn't confirmed.

Where to buy

Check price on Amazon.in
How to make sure you get a genuine copyEditions and the details worth checking.

About the editions

UNO Stacko has no Indian edition. The box we link is Mattel's 2025 version, item JGT89, made in Vietnam: Mattel's own photo of the box back says so, and the Amazon.in listing names Mattel's Indian company as importer. Our Amazon.in link goes to this box.

Before you choose

  • The box should show the Mattel Games and UNO logos and the name UNO Stacko, with 45 blocks and a loading tray
  • The blocks should be printed with UNO-style numbers and action symbols in UNO's colours
  • Mattel's box for this item is printed 'Made in Vietnam' and carries Mattel's name and address; the Amazon.in listing names Mattel Toys (I) Pvt. Ltd. as importer
  • Be wary of unbranded coloured stacking-block towers sold with UNO-like names and no Mattel logo
  • Check for the ISI mark; toys sold in India must carry it

What reviewers and players say

UNO Stacko has been around since the 1990s, but we found no full review of the 2025 box. Rules guides from Geeky Hobbies (February 2025) and GameRules.com describe it as Jenga with UNO's matching rules: the colour or number you must pull narrows your choices, and action blocks can force the next player to pull two. Geeky Hobbies rates it light on strategy with moderate to high luck. Mattel's description of the new box stresses that it gets harder as the stack grows, and lists it for 2 to 10 players aged 7 and up.

What people love

  • Two familiar games in one: UNO's matching and Jenga's wobble
  • Plays with up to 10, so the whole family can join in
  • Action blocks add surprises, such as making the next player pull two
  • The loading tray makes building the tower and packing up quicker

Common complaints

  • Little strategy: steady hands and luck matter more than decisions
  • Late in the game you may be forced to pull a risky block because it's the only match left
  • The crash is loud, and blocks scatter across the floor
Based on 5 reviews and discussions

Summarised in our own words from the sources above. We don't use Amazon reviews or ratings.

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Questions people ask about UNO Stacko

What is the difference between UNO and UNO Stacko?

UNO is a card game; UNO Stacko is a block-tower game in the style of Jenga. You don't hold a hand of cards: on your turn you pull a block from the tower that matches the last one by colour or number, and stack it on top. Action blocks such as Reverse, Skip and Draw Two work much like UNO's cards, and whoever knocks the tower down loses.

Is UNO Stacko the same as Jenga?

It uses the same idea of pulling blocks from a tower and stacking them on top, but the blocks are coloured and numbered, and you must pull one that matches the last block played. Action blocks can make the next player pull two blocks or miss a turn. In Jenga you can pull any loose block.

How is the new UNO Stacko box different from older ones?

The 2025 box (Mattel item JGT89) keeps 45 blocks and a loading tray but has new packaging. Mattel's description lets you match by symbol as well as colour or number, and its product notes, as retailers carry them, mention colour-blind symbols on the blocks. The idea is the same one Mattel has sold since the 1990s.

How many players can play UNO Stacko, and what age is it for?

Mattel says 2 to 10 players, ages 7 and up. With two players, Reverse and Skip blocks count as Draw Two, so the other player must pull two blocks.

Is UNO Stacko made in India?

No. Mattel's photo of this box's back says 'Made in Vietnam', and the Amazon.in listing names Mattel's Indian company as importer.

Game facts

Publisher
Mattel (Mattel Games)
In India
Mattel Toys (I) Pvt. Ltd. (named as importer on the Amazon.in listing)
First published
2025
Players
2–10
Barcode
194735322428
Language
No reading – The blocks carry colours, numbers and action symbols only. Mattel's rule sheet is the only text, and the rules are easy to explain in any language.
Sources & photo creditsThe references behind this guide.

Facts on this page come from the publisher, the Indian maker or distributor, and the sources below. Photos are credited under each one.