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Double Stacks slot review

NetEnt’s new release will instantly appeal to enthusiasts of classic fruit machines. Double Stacks slot features all those familiar fruit machine symbols and comes with a rewarding Double Stacks feature that will significantly boost your wins, especially during the free spins round. Read our full review of Double Stacks slot to learn about its features in more detail and to get direct access to the best online casinos which have already included this slot in their game collection.

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Double Stacks slot features

Symbols in Double Stack slot consist of lower-value plums, watermelons, cherries and lemons, and higher-value bells, 7s, bars and diamonds, with the diamond being the most lucrative symbol which pays out a maximum of 1000x your stake if you manage to fill up an entire screen full of this symbol. What's interesting about Double Stacks is that these higher-paying symbols can also land stacked on the reels to increase your winnings. There’s also a wild symbol which will substitute for all other symbols except the scatter.

Predictably, the game’s Double Stacks feature is the highlight of this slot. This kicks in when all symbols on one reel display the same stacked symbol. When this happens, all the symbols will count as double when calculating your winnings for that spin.

Double Stacks slot free spins

If you get 3 or more scatters anywhere on the reels while playing Double Stacks slot, you’ll unlock the game’s Double Stacks feature by getting between 5 and 30 free spins. During this round, the 4 highest-paying symbols will land in stacks on the reels, whereas the wild symbols will also land in stacks to significantly increase the win potential. Landing another 2, 3, 4 or 5 more scatters anywhere on the reels during this round will give you an additional 2, 5, 15 or 30 free spins.

Double Stacks slot free spins

Double Stacks slot bonus

Being one other NetEnt release with a very promising outlook for success, it should be relatively easy to get a bonus on Double Stacks slot in the coming weeks. Mr Green casino in fact is already running a Reel Thrill tournament on this slot, which will be giving away a total of 1,000 free spins. You could also claim a free spins or deposit match bonus if you sign up with a casino as a new player; Dream Vegas casino, for instance, welcomes new players with a 200% match bonus which you may use on any slot in its collection, including Double Stacks slot. To discover more offers, visit our Promotions page in the next days, since this is where we'll be publishing all the offers we encounter on Double Stacks slot. 

Where to play Double Stacks slot

£ 400 bonus on first deposit 50 bonus spins. New players only. 100% match up to £400. One bonus offer per player. Min. deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute towards any wagering requirements

£ 50 bonus on first deposit and 50 free spins on first deposit. New UK customers only. Opt in required. 1x per customer. Min. £20 deposit. 1st deposit only. Selected games only. Max. Bonus £50 with 35x wagering and 50 Free Spins at £0.20/spin on Starburst™ with 35x Wagering. Free Spins and Bonus credited once deposit amount has been wagered on slots. Bonus and Free Spins expire 7 days after issue. Game weighting, game, country, currency, player restrictions and terms apply.

500 free spins on first deposit.
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Win up to 500 Free Spins from Mega Wheel on 1st deposit. 24-hour expiry. Max bet £2.50, max spins win £8 per 10 spins, max Bonus win £150, selected games & 65x wagering on winnings. No Neteller/Skrill. Deposit/withdrawal fees apply. Full T&Cs apply

Double Stacks slot min/max bets, RTP, volatility and maximum win

If you decide to play Double Stacks slot for real money, you can bet a minimum of 10p and up to a maximum of £200 per spin. The game has a decent RTP of 96.10% while volatility is low to medium. The maximum you can win from this game is 1,000 x your stake during the free spins feature. However, we found hit frequency to be rather on the low side for a medium-variance slot, and the free spins round difficult to trigger.

Double Stacks slot graphics and sound

Double Stacks initially looks like any other classic online slot, featuring brightly coloured symbols against a dark background illuminated by flashes of neon lights. The 80s soundtrack is perfect for winding down after a busy day, and all in all, the slot’s high-quality graphics and sound effects are perfectly fitting to the game’s theme.

Double Stacks slot big win

Double Stacks slot – our Conclusion

Double Stacks has the potential to become another NetEnt classic and reminds us a lot of Twin Spin, a slot by the same developer that has remained popular over the past few years. In our opinion, Twin Spin can be much more rewarding, since we found the high payouts in Double Stacks harder to get, but then the free spins round in this new release might really make up for previous non-winning streaks. It might not be the next Starburst, but that's not to say it's not worth a try! Check the casinos we recommend on this page to play it with a secure casino that caters to UK customers, and best of luck!

£ 100 bonus on first deposit 120 bonus spins. 18+ New Customers only. 20 no deposit free spins available on Book of Dead game only. Must be claimed on the 'My Offers' page within 14 days of sign-up. Free Spins have a £0.10 value each and expire 7 days from claim. 35x wagering requirement on eligible slots before winnings are converted to cash. Select Casino offer on sign-up and deposit. 4 deposits of £10, £20, £50, £100 matched with a bonus cash offer of same value (14 day expiry). 35x real money cash wagering (within 30 days) on eligible games before bonus cash is credited. Spins credited upon deposits; under £50 =10 Spins, £50 or over =25 Spins; on Book of Dead only (3 day expiry, winnings paid in cash).