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NetEnt · Slot Review

Silverback Gold — Full Review & Free Demo

3.7/5
Play for Real →
RTP
96.10%
Volatility
High
Max Win
45,000x
Provider
Reels
5
Paylines
1024
Bet Range ($,€,£)
0.1 - 100
Rating
3.7/5
Released
Dec 2021

Silverback Gold Slot Overview

Silverback Gold is a jungle-themed video slot from NetEnt, played on a 5x4 grid with 1,024 ways to win. Released in December 2021, it follows in the footsteps of the studio's earlier Gorilla Kingdom but arrives with a significantly sharper edge. Volatility has been cranked from medium to high, the max win jumps to 45,126x, and a new token collection mechanic adds genuine progression to the bonus round.

What stands out here is the design choice to pair a Hold and Spin mini-game with a tiered symbol upgrade system during Free Spins. Bets range from 0.10 to 100 per spin, the RTP sits at 96.11%, and the hit frequency hovers around 36.58%. Compared to the studio's previous work on the gorilla theme, Silverback Gold feels like a deliberate answer to the criticism that Gorilla Kingdom lacked big-win potential.

Paytable, Symbols and Design

Visually, Silverback Gold sticks close to its predecessor. A dense jungle backdrop frames the reels, with light bouncing off foliage in warm tones. Animal symbols are rendered in crisp detail; when they form wins, short animations bring them to life. I'm not entirely sold on the theme feeling fresh, since jungle-gorilla slots are well-trodden ground, but NetEnt's production quality keeps it looking polished.

Low-paying royals (9 through A) return 1x to 1.5x for five of a kind. Four animal premiums sit above them: bird, snake, crocodile and leopard, paying 2.5x to 3x. Two silverback gorilla symbols top the table. The regular silverback pays 4x for five across, while the golden silverback, available only in free spins, pays 8x. Both gorilla symbols require just two of a kind to award a payout.

A sunset landscape acts as the wild, substituting for everything except the scatter. The scatter itself is a golden gong. During Free Spins, wilds gain x2 or x3 multipliers, and multiple multiplier wilds on the same winning line have their values multiplied together.

Symbol Payouts

icon 1
Silverback
Premium gorilla symbol that pays from two of a kind.
5x8
4x4
3x2
2x1
icon 2
5x4
4x2
3x1
2x0.5
icon 3
5x3
4x1.5
3x0.8
icon 4
5x3
4x1.5
3x0.8
icon 5
5x2.5
4x1.2
3x0.6
icon 6
5x2.5
4x1.2
3x0.6
icon 7
5x1.5
4x1
3x0.3
icon 8
5x1.5
4x1
3x0.3
icon 9
5x1.5
4x1
3x0.3
icon 10
5x1
4x0.5
3x0.2
icon 11
5x1
4x0.5
3x0.2
icon 12
5x1
4x0.5
3x0.2
icon 13
Scatter
icon 14
Wild

Bonus Features Breakdown

Four features shape the gameplay. The Silverback Attack is a random modifier active in both the base game and free spins. It places 6 to 20 silverback symbols onto the reels mid-spin. Simple in concept, but it can produce surprisingly strong results when it fires at the right moment.

Landing 3, 4 or 5 scatters triggers the Bonus Game, a Hold and Spin round with 3 initial respins. Triggering scatters lock in place, and only token symbols or blanks can appear. Each token that lands reveals a value (1, 2, 3, 5, 10 or 25) and resets the spin count to 3. The round ends when respins run out, all 20 positions fill, or accumulated token values hit 300. Those tokens then carry into Free Spins, where they fill a collect meter that progressively upgrades animal symbols into silverbacks: 30 tokens converts crocodiles, 60 converts leopards, 120 converts snakes, 200 converts birds, and 300 turns all silverbacks golden.

During Free Spins (10, 15 or 20 depending on trigger scatters), wild symbols carry x2 or x3 multipliers. Additional scatters each add one extra spin with no cap. A Bonus Buy option lets you skip straight in for 100x your stake, guaranteeing at least 3 scatters on the triggering spin.

Bonus Buy Options

Bonus Buy Silverback Attack
Silverback Attack
Random feature that adds 6 to 20 silverback symbols to the reels during any spin in base game or free spins.
Bonus Buy Bonus Game
Bonus Game
Hold-and-spin token collection round triggered by 3+ scatters, awarding 3 respins to collect tokens before free spins begin.
Bonus Buy Free Spins
Free Spins
10, 15 or 20 free spins with symbol upgrades based on tokens collected; wilds carry x2 or x3 multipliers that multiply each other.
Bonus Buy Bonus Buy
Bonus Buy
Purchase entry to the bonus game and free spins for 100x your stake, guaranteeing at least 3 scatter symbols.
Feature Cost: 100x

RTP, Volatility and Max Win

Silverback Gold carries an RTP of 96.11% at its default setting, though NetEnt distributes a lower 92.11% variant to some operators. Always check the in-game info before spinning. Volatility is high, and the maximum win reaches 45,126x the bet. With a hit frequency of roughly 36.58%, base game returns land on nearly every third spin, but meaningful payouts are heavily concentrated in the bonus round.

The base game can drag a bit between feature triggers, which is the trade-off for such a large ceiling. Not everyone will enjoy this volatility profile, and casual players should size their bets conservatively.

Ryan Cole’s Verdict

Verdict

Compared to Gorilla Kingdom, Silverback Gold represents a meaningful step forward. The token collection mechanic gives the bonus round genuine progression rather than a flat set of free spins, and the fact that symbols can arrive partially or fully upgraded before a single free spin plays out is clever design work. The Silverback Attack random feature also adds base-game interest that the predecessor lacked.

Still, the symbol upgrade order, converting higher-value symbols first, makes full progression difficult in practice. Many bonus rounds will end partway through the upgrade ladder, and the base game stretches between triggers can test patience. For high-volatility enthusiasts who enjoy layered bonus structures and large win ceilings, Silverback Gold is a solid pick. Casual spinners may find the swings too aggressive for extended sessions.
3.7
★★★★☆
out of 5
✓ Pros
Massive 45,126x max win potential
Token collect meter adds strategic depth
Silverback Attack randomly boosts base game
Multiplier wilds multiply each other in free spins
Bonus Buy available at 100x stake
✗ Cons
High volatility may punish smaller bankrolls
Base game can feel quiet without feature triggers
No progressive jackpot available
Symbol upgrade order favours less frequent symbols first
Ryan Cole
Ryan Cole
Lead Casino Slots Analyst
5+ years analysing online slots for the UK market. Every game is played for a minimum of 500 demo spins before publication. No affiliate bias — ever.
View All Reviews →
Silverback Gold FAQ
How does the token collect meter work in Silverback Gold free spins?
Tokens gathered during the hold-and-spin Bonus Game carry into Free Spins and fill a collect meter. At 30 tokens crocodiles upgrade to silverbacks, at 60 leopards upgrade, at 120 snakes, at 200 birds, and at 300 all silverbacks become golden silverbacks. Additional tokens can also land on silverback symbols during free spins.
What triggers the Silverback Attack feature and how many symbols does it add?
Silverback Attack activates randomly on any spin in the base game or free spins. It places between 6 and 20 silverback symbols onto the reels before they stop spinning.
How much does the Bonus Buy cost and what does it guarantee?
The Bonus Buy costs 100x your stake. It triggers a spin that guarantees a minimum of 3 scatter symbols, leading into the Bonus Game token round followed by Free Spins. Availability depends on your jurisdiction.
Do multiplier wilds stack in Silverback Gold free spins?
Yes. Wild symbols during Free Spins carry either an x2 or x3 multiplier. When two or more multiplier wilds appear on the same winning way, their values are multiplied together rather than added.
How many free spins can you get and is there a retrigger limit?
Landing 3, 4 or 5 scatters awards 10, 15 or 20 free spins. During the round, each additional scatter that lands adds one extra free spin. There is no stated cap on retriggers.