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BGaming · Slot Review

Gemza — Full Review & Free Demo

3.7/5
Play for Real →
RTP
97.17%
Volatility
High
Max Win
5,000x
Provider
Reels
N/A
Paylines
Pays Anywhere
Bet Range ($,€,£)
0.20 - 50
Rating
3.7/5
Released
Dec 2023

Gemza Slot Overview

Gemza is a fantasy-themed slot from BGaming built on a 5x5 grid with a Pays Anywhere mechanic. You need 8 or more matching symbols landing anywhere on screen to form a win. Below the main grid sits an extra horizontal reel adding five more symbol positions per spin, which genuinely changes the dynamic compared to a standard cluster game.

RTP comes in at a very generous 97.17%, volatility is very high, and the max win caps at 5,000x. I loaded this up expecting another gem-themed Bonanza clone, and while the structure is familiar, the extra reel and the multiplier accumulation during Free Spins give it its own identity. Released December 2023, it runs smoothly on mobile and desktop.

Symbols and Paytable

Lower-paying symbols are black-shaded icons: gem left, gem right, star, crown, and heart. Landing 12 or more of any of these pays between 2x and 10x your stake. Higher-paying symbols are coloured gemstones: green, pink, yellow, and blue. Twelve or more of the blue gem pays the top regular prize of 50x.

Scatter is a golden key. Four keys trigger the bonus and pay 3x; five keys pay 5x; six pay a chunky 100x on top of launching Free Spins. The Multiplier Symbol looks like a wooden chest and carries a random value from x2 up to x500. There is no Wild symbol in this game, so all wins come purely from cluster matching and multipliers.

Symbol Payouts

icon 1
6x100
5x5
4x3
icon 2
6x50
5x25
4x10
icon 3
6x25
5x10
4x2.5
icon 4
6x15
5x5
4x2
icon 5
6x12
5x2
4x1.5
icon 6
6x10
5x1.5
4x1
icon 7
6x8
5x1.2
4x0.8
icon 8
6x5
5x1
4x0.5
icon 9
6x4
5x0.9
4x0.4
icon 10
6x2
5x0.75
4x0.25
icon 11
Multiplier
2x500
icon 12
Scatter
Landing 4+ anywhere triggers 15 Free Spins; payouts of 3x, 5x, or 100x for 4, 5, or 6 Scatters respectively.
6x100
5x5
4x3

Bonus Features Breakdown

The Refilling mechanic removes winning symbols after each payout, dropping new ones from above. Chains keep going until no new wins form. During refills in the base game, any Multiplier Symbols on screen stay put, and their values are summed together before applying to your total win for that spin sequence. That combination can produce surprisingly punchy base game hits.

Land 4 or more golden key Scatters and you get 15 Free Spins. Here is where it gets interesting for stream, chat. Every Multiplier Symbol that lands as part of a win adds its value to a cumulative Multiplier Meter above the reels. That meter carries forward and applies to all subsequent wins for the rest of the round. Three or more Scatters during the feature retrigger 5 extra spins.

Chance x2 costs 25% extra on your bet and doubles the chance of triggering Free Spins. Alternatively, the Buy Bonus lets you skip straight into the feature for 100x your stake. You cannot use both at once. If I'm honest with chat, the bonus buy price is reasonable, and the accumulating multiplier makes the feature round feel genuinely different from the base game.

Bonus Buy Options

Bonus Buy Free Spins Round
Free Spins Round
Land 4 or more Scatter symbols anywhere to trigger 15 free spins. During free spins, all multiplier symbol values accumulate into a global multiplier applied to subsequent wins. Landing 3+ Scatters during the round awards 5 additional spins.
RTP: 97.17%
Bonus Buy Buy Bonus
Buy Bonus
Purchase the Free Spins round directly for 100x the current bet. Price adjusts automatically when bet changes. Disabled when Chance x2 is active.
Feature Cost: 100x betRTP: 97.17%
Bonus Buy Chance x2
Chance x2
Increases the bet by 25% to double the chances of triggering Free Spins. Disabled when Buy Bonus is active.
Feature Cost: 25% extra on betRTP: 97.17%

Volatility, RTP, and Max Win

97.17% RTP is well above average and one of the highest you will find from BGaming. Hit rate listed at 8.17% means roughly 1 in 12 spins produces a win, which feels low during sessions. Base game can drag a bit between clusters, so you really are leaning on refill chains and multiplier drops to keep things moving.

Max win of 5,000x is decent but not enormous for a very high volatility slot. Some viewers might expect more ceiling from a game this swingy. Still, the 97.17% RTP compensates, and the accumulating multiplier in Free Spins gives a realistic path toward bigger payouts if the round extends.

Ryan Cole’s Verdict

Gemza Slot Conclusion

I'd stream this. Gemza has a solid base game loop with the extra reel adding just enough variety, and the Free Spins accumulating multiplier makes every bonus round feel like it could escalate quickly. The RTP is fantastic, the Buy Bonus at 100x is fair, and the dwarven mine setting with its dragon bonus backdrop is a nice visual touch.

My only gripe is the 5,000x cap. For a slot this volatile, I expected a higher ceiling. Not everyone will enjoy sitting through the dry spells either; the 8.17% hit rate means patience is required. But if you like scatter-pays mechanics and want a high-RTP option worth a session, Gemza belongs on the list.
3.7
★★★★☆
out of 5
✓ Pros
Exceptional 97.17% RTP well above average
Multiplier symbols up to x500 in both games
Extra reel adds five bonus symbol positions
Refilling mechanic chains consecutive wins
Bonus Buy and Chance x2 options available
✗ Cons
Very high volatility means long dry spells
5,000x max win modest for this volatility
No Wild symbol in the game
Base game hit rate of 8.17% feels sparse
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.
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Gemza FAQ
How does the Extra Reel work in Gemza?
A horizontal reel sits beneath the main 5x5 grid and displays 5 additional symbols every spin. These symbols count toward matching clusters on the main grid, effectively increasing the area where winning combinations can form.
What triggers Free Spins and how many do you get?
Landing 4 or more golden key Scatter symbols anywhere on the reels triggers 15 Free Spins. During the round, hitting 3 or more Scatters awards 5 additional spins.
How does the Multiplier Meter accumulate during Free Spins?
Every Multiplier Symbol that contributes to a win during Free Spins adds its value to a running total displayed above the reels. That accumulated multiplier then applies to all subsequent winning combinations for the rest of the bonus round.
How much does the Bonus Buy cost and can you use Chance x2 at the same time?
The Buy Bonus costs 100x your current bet and grants 15 Free Spins immediately. Chance x2 adds 25% to your bet to double free spin trigger odds. You cannot activate both features simultaneously.
What is the maximum win and how do you reach it?
The max win is 5,000x your stake, equivalent to up to 250,000 EUR. Reaching it requires high-value multiplier symbols accumulating during Free Spins combined with large cluster wins on the refilling sequences.