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Double Stacks

There are some clearly visible fruit machine roots in Double Stacks, a 2018 NetEnt video slot. We can also clearly see the influence of some previously released NetEnt games in Double Stacks, with Swipe & Roll and Berryburst immediately coming to mind. One could also make a case for the influence of Starburst on Double Stacks.
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Double Stacks will surprise players with its big potential for re-spins – NetEnt has created another vintage-inspired winner!


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Double Stacks Pros & Cons

  • Thumbs-Up Excellent animation and sound design
  • Thumbs-Up Easy gameplay
  • Thumbs-Up Features boost winnings
  • Thumbs-Down No jackpot

Double Stacks Slot Review

Double Stacks introduces an interesting new game mechanic that takes an otherwise quite simple game into more exciting territory. We’ll be talking about that later on. The neon and funky soundtrack to this game are sure to appeal to more distinguished players as well as those fresh-faced casino lovers who enjoy a good vintage vibe.

Easy to play and with straightforward game mechanics, Double Stacks offers an entertaining and relaxing gambling experience, with the occasional shot of adrenaline as that Double Stacks feature kicks in. Let’s take a look at how NetEnt has created a game that stands out.

  • 5 reels, 3 rows, 10 betlines
  • Default coin values 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1, 2
  • Default bet levels 1-10
  • Bet minimum of £0.1; maximum bet £200
  • Maximum win 10,000 coins on a single betline
  • Special features include Wilds, Double Stacks Feature, Free Spins feature
  • Return to Player of 96.1%
  • Variance is medium

Double Stacks bonus features

NetEnt is transporting us back to the glory days of slot machines, back when they were also called fruit machines. Watermelons, cherries, lemons, and plums make up the basic slot symbols (and more of your five-a-day). The four high-paying symbols are the bar, the bell, the diamond and the lucky number 7. Fill the screen with these symbols to boost your winnings.

The diamond symbol has the highest value. Landing five of these on a payline will reward the player with x4.5 their initial bet. The Scatter symbol is a disco ball – a fitting choice for this groovy slot!


The Wilds symbol is a pair of golden stars. It can substitute for any other symbol on the screen except the Scatter.

Double Stacks feature

This feature is the big draw on this game. When identical symbols appear on top of one another once the reels stop after a spin, the Double Stack feature is activated. When that happens, all the stacked symbols are effectively doubled, with each single symbol counting as two symbols.

So if five winning symbols land on a payline, the Double Stacks feature will turn them into ten winning symbols, thus doubling the size of the winning combination. A winning combination of diamonds, for instance, will translate to a win of x1,000 the original wager.

Double Stacks free spins

Double Stacks also feature a Free Spins bonus feature. This is triggered when 3 or more Scatter symbols appear anywhere on the game screen. 3 disco balls will land you 5 free spins; 4 Scatters mean 15 extra spins; 5 Scatters reward with 30 free spins.

Wilds and the 4 premium, high value symbols can appear during free spins, with stacking also possible. This means that it is possible completely fill the screen with a single symbol and landing a big win.
Free spins can be re-triggered by Scatter symbols while the feature is active. Two, 3, 4, or 5 Scatters will rewards with 2, 5, 15, and 30 extra free spins, respectively.

Double Stacks jackpot

Double Stacks does not offer a progressive jackpot. There is plenty of opportunity for big in-game wins though, thanks to those Double Stacks and Free Spins features.


The Double Stacks slot has a Return to Player of 96.1% – that’s about average for a slot game and within the usual range for a NetEnt slot.

Double Stacks on Mobile

Play Double Stacks anywhere thanks to the NetEnt Touch version of this slot. Take Double Stacks with you on your iPhone, iPad or Android smartphone or tablet and enjoy the same top-notch NetEnt experience as you would on a computer.

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Leanna Madden is an expert in online slots, specializing in analyzing game providers and evaluating the quality and variety of slot games. With her extensive knowledge, she guides players to the best slot options, including high RTP slots and those with exciting bonus features. Leanna's insights help players make informed decisions and enjoy rewarding slot experiences at online casinos.

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