Double Stacks Slot Review

The Background of Double Stacks Slot

Double Stacks came out of NetEnt’s studio in 2018, and I have kept coming back to it ever since. The slot mixes a fruit-machine vibe with sharp HD graphics and a modern maths model. You get 5 reels, 3 rows and 10 fixed paylines, with bets from 0.10 to 200 per spin, so both cautious players and high-stake fans can find a level that feels comfortable.

On paper, Double Stacks sits in the medium to high volatility bracket, though in my sessions it leans towards the punchier side. The stated RTP is 96.1%, which is standard for NetEnt. The maximum win is around 1,700x your bet or 352,600 in currency terms at the ceiling stake, so the game can hit hard when the Double Stacks mechanic lines up with the free spins.

Graphics, Sound, Design of Double Stacks Slot

Visually, Double Stacks hits that sweet spot between retro and neon arcade. Cherries, lemons, plums and watermelons spin alongside bells, bars, sevens and diamonds on a dark blue background, and the colours really pop. When a screen fills with stacked symbols it looks like an old-school fruit machine cranked up for HD, and that keeps the base game from feeling flat even during quieter patches.

The soundtrack fits the style nicely. Each spin has a light electronic jingle, and wins trigger brighter stabs that never feel intrusive on longer sessions. The reel stops have that satisfying click I look for in classic-themed slots. When you hit bigger combinations or trigger free spins, the audio ramps up just enough to signal a change of pace without drowning out everything else on your device.

Interface-wise, Double Stacks keeps things clean. Bet level and coin value sit under the reels, the spin and autoplay buttons are obvious, and you can access the paytable and rules with a single tap. On mobile, the HTML5 build runs smoothly in both portrait and landscape on my phone and tablet, with no awkward resizing or tiny buttons, so spinning on the go works very well.

Gameplay of Double Stacks

Gameplay in Double Stacks is straightforward but has a few hooks that keep me interested. You play on 5 reels and 10 fixed paylines, winning from left to right with three or more matching symbols. It is a medium volatility slot on paper, though runs can swing when stacked premiums land. The balance between steady smaller fruit wins and the rarer, heavier hits from sevens and diamonds feels well judged.

Symbols of Double Stacks Slot by NetEnt

The symbol set in Double Stacks sticks closely to the fruit-machine roots. Low pays are the fruits: cherries, lemons, plums and watermelons. Premiums are bells, bars, sevens and shimmering diamonds, all of which can appear stacked on the reels. In paytable terms, diamonds sit at the top, followed by sevens, while the basic fruits keep the smaller hits flowing when the high-value icons take a breather.

Special symbols play a big part in how Double Stacks pays. The gold star Wild substitutes for regular icons and is also one of the stronger pays on its own. The rainbow Scatter triggers free spins when three or more land anywhere. During both base game and bonus, when a reel stops with one premium symbol filling all three positions, the Double Stacks mechanic kicks in and each of those symbols counts as two.

Symbols and Paytable

Symbol	Quantity	Payout
	10	x100
	9	x25
	8	x17.5
	7	x12
	6	x9
	5	x4.5
	4	x3
	3	x1.5
	10	x50
	9	x17.5
	8	x15
	7	x10
	6	x8
	5	x4
	4	x2
	3	x1
	10	x25
	9	x12
	8	x9
	7	x7
	6	x6
	5	x3
	4	x1.5
	3	x1
	10	x10
	9	x8
	8	x6
	7	x5
	6	x3
	5	x2
	4	x1
	3	x0.5
	9	x6
	8	x5
	7	x4
	6	x3
	5	x2
	4	x1
	3	x0.5
	9	x6
	8	x5
	7	x4
	6	x3
	5	x2
	4	x1
	3	x0.5
	9	x6
	8	x5
	7	x4
	6	x3
	5	x2
	4	x1
	3	x0.5
	9	x6
	8	x5
	7	x4
	6	x3
	5	x2
	4	x1
	3	x0.5
	Scatter
	Wild

Double Stacks Features

The headline feature in Double Stacks is right there in the name. When a premium symbol covers a whole reel, those icons double, so a full screen of diamonds effectively counts as ten-of-a-kind on each line. Free spins come from the Scatter symbols, with up to 30 spins on offer if you land five. During free spins, stacked Wilds and more frequent Double Stacks hits give the slot its heavier punch.

In my experience, the bonus round is where Double Stacks can really open up. The game’s stated hit frequency is around 16%, so you do get plenty of smaller base-game wins between the bigger moments. When reels line up with stacked sevens or diamonds in the feature, it is possible to reach wins close to the 1,700x cap, especially if Wild stacks land on more than one reel.

Pros and Cons of Double Stacks Game

From a regular player’s point of view, Double Stacks has clear strengths and a few drawbacks. I like the bright fruit theme, the straightforward 10-line layout and the way the Double Stacks mechanic ties the whole slot together. On the flip side, there is no progressive jackpot, and sessions can feel swingy when the feature is slow, so it suits players who enjoy classic slots with punchy peaks.

Screenshots