Double Stacks Slot: Introduction

With the MAX concept having been launched recently and NetEnt openly addressing the feedback about their games’ limited potential, we were more eager than usual to load up Double Stacks for this review. At first, after seeing the splash screen, we thought the absolute max win was 1000x and it felt like a letdown. Luckily, as shown in the promo video, that figure is the max win per single spin. So, at least in theory, it’s possible to win far beyond 10,000 times the stake within one bonus.

Double Stacks is a 5-reel, 3-row, 10-line video slot featuring a Double Stacks feature and Free Spins with stacked wilds. Bets on this game start at €0.10 and go up to €200, which means high rollers can hit wins of €200,000 on a single spin.

In terms of volatility, it likely sits somewhere around medium, although with NetEnt it can be tricky to pin down—some titles play like high variance slots but deliver payouts that feel closer to low-to-medium variance. As usual for NetEnt, the RTP is solid and clearly listed in the game overview at 96.1%.

On the visual side, it’s a gorgeous slot that gives off Starburst and Twin Spin style energy. The soundtrack, though, deserves special mention. It was one of the first things that stood out when we launched the game, and we instantly loved it. Music is subjective, of course, but this 80’s tribute track is exceptional and would fit perfectly as an intro to a series like Stranger Things. We’ll be “borrowing” it from NetEnt and running it in the background!

Double Stacks Slot: Symbols & Paytable

The paytable is refreshingly simple, which we definitely appreciate on a scorching summer day when thinking feels like hard work. The game includes 8 regular symbols: 4 low-value symbols shown as watermelons, lemons, plums and cherries, plus 4 premium symbols in the form of bells, bars, sevens and diamonds.

The diamond is the top-paying symbol, awarding 4,5 times the stake for 5 across a full payline. All premium symbols can land stacked on the reels, and the main goal is ideally to hit a full screen of diamonds, which triggers the max win of 1000x. For each high-value symbol, the max win relative to your current bet is shown above the reels.

Alongside the standard symbols, there’s also a regular Scatter symbol and a Wild, and unlike the regular symbols these do not appear stacked in the base game.

Double Stacks Slot: Feature

This feature triggers when a reel stops with only one symbol type showing on it. When that happens, every symbol on that reel counts as two symbols when wins are calculated for the current spin.

Double Stacks Slot: Free Spins

3, 4 or 5 scatter symbols landing anywhere on the reels in the base game will trigger 5, 15 or 30 Free Spins respectively. In Free Spins, not only do the 4 highest-paying symbols continue to appear stacked, but Wild symbols can also land in stacks, which naturally boosts the chances of hitting the max win. During the bonus, 2, 3, 4 or 5 Scatter symbols appearing anywhere on the reels will grant an additional 2, 5, 15 or 30 Free Spins respectively.

Double Stacks Slot: Conclusion

There’s plenty to like here—like we said earlier, the graphics look great, the soundtrack is among the best we’ve heard in quite some time, and the gameplay feels fluid. We initially believed the 1000x figure was the total max win for the bonus, but it’s actually the max win per single spin, giving the slot much better potential than it first appears. In our view, this could be one of NetEnt’s strongest releases in a while, and with 15 to 30 free spins plus a re-trigger, it might even become a real monster.

Double Stacks can be found at most casinos featured on our list of best online casinos.