Play money · no sign-up · no deposit
- RTP
- 96.12%
- Volatility
- High
- Grid
- 5x4
Fantasma GamesReleases 24 Nov 2026UPCOMING
Fusion Fever Demo & review
A 5x4, 20-line lab slot where five Energy coins start a hold-and-respin Fusion Bonus, and the coins that trigger it set the value of every coin after.
Written by Hampus GravePublished 10 Nov 2026Updated 11 Nov 2026
6.2/10
Yes, if you play for hold-and-respin rounds. Five Energy coins start a Fusion Bonus where each new coin resets three spins and carries the trigger's total, so a strong opening screen lifts the whole board. Line wins between those rounds stayed small for us, and nothing can be bought, so every round has to arrive by itself.
Who it suits
Play this if…
- Hold-and-respin is your favourite feature: every new coin resets three spins and locks in place
- You like a trigger that matters: the opening coins set the value of the entire Fusion Bonus
- Fixed prize lists suit you: the Fever Wheel pays from a table you can read before you start
Skip this if…
- Line wins keep you playing: almost all of ours were small change beside the coins
- You want the feature on demand: there is no buy or paid mode to reach it
- You chase a published ceiling: the studio states no maximum win for this game
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18+ · T&Cs apply · Offer checked 7 Oct 2026
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Fusion Fever: Full Review
One Fusion Bonus paid $104.60 of what our 100 base spins of Fusion Fever returned, and the other 99 spins made $12.60 between them. Fantasma Games releases it in November 2026, and the free demo here is the pre-release build we tested. Energy coins drive a 5x4, 20-line game whose real prize is a hold-and-respin round, and it suits players happy to sit through small line wins to reach it.
Fusion Fever game information
- Provider
- Fantasma Games
- Release date
- 24 November 2026
- Grid
- 5 x 4 (reels x rows)
- How it pays
- 20 paylines
- RTP
- 96.12% (casinos may also run 94.12% or 92.12%)
- Volatility
- High
- Bet range
- $0.10 to $1,000
- Bonus buy
- Not available
How Fusion Fever works
The number of Energy coins on the board decides what a spin does. They are scatters carrying 0.2x to 10x, and the 20 lines beside them pay small amounts.
| Energy coins on one spin | What happens |
|---|---|
| 1 to 3 | A random chance of the Fever Wheel |
| 4 | The Multiplier: the coins' total is multiplied by x2, x3, x4, x5 or x10 |
| 5 or more | The Fusion Bonus |
Spin 202 shows the middle step. Coins of 0.2, 0.4, 6 and 0.2 added up to 6.8x, and a x2 Multiplier turned that into $13.60.
Spin 202: four Energy coins and a x2 Multiplier. FluxPlays demo test, 10 November 2026.
How the features connect:
- Five or more Energy coins start the Fusion Bonus, and the coins' total sets the value of every new Fusion coin.
- Three Bonus symbols, one each on reels 2, 3 and 4, open Bonus Spins, where Energy coins fill a collector.
- Five Energy coins inside Bonus Spins start a Fusion Bonus, and its award goes into that collector.
- The Fever Wheel comes from a low coin count in the base game, or from a full Fusion Bonus board.
The Fusion Bonus carries the game, and Bonus Spins are the quieter route.
| Symbol | 5 | 4 | 3 |
|---|---|---|---|
| Wild | $50.00 | $3.00 | $2.00 |
| Pink mouse | $4.00 | $1.50 | $1.00 |
| Green mouse | $3.00 | $1.00 | $0.50 |
| Blue mouse | $2.00 | $0.80 | $0.40 |
| A, K | $1.50 | $0.30 | $0.10 |
| Q, J | $1.00 | $0.20 | $0.10 |
A line pays only its highest win, and separate lines add up.
The base game after spin 100, with one Energy coin on the board. FluxPlays demo test, 10 November 2026.
How the Fusion Bonus works
Five or more Energy coins lock in place and award 3 spins, and every other position becomes its own spinning reel. Only Blank, Fusion, Multiplier and Fever symbols can land. Any new Fusion, Multiplier or Fever symbol locks and resets the count to 3.
Every Fusion coin takes the combined value of the Energy coins on the trigger screen, so the opening board sets the size of the whole round. Multipliers of x2 to x5 act only on Energy and Fusion values, never on Fever prizes. When the spins run out everything is added up and paid, and locking all 20 positions adds the Fever Wheel.
Spin 215's award screen: every Fusion coin that lands will be worth 5.5. FluxPlays demo test, 10 November 2026.
On spin 215 six coins came to 5.5x, so every Fusion coin took that value. Eleven of them added $60.50 and a Major added 50x. With the coins' own value, the round came to $116.00.
Both of our rounds finished with two positions still open, so the award for a full board stayed out of reach.
The settled board after spin 215's Fusion Bonus. FluxPlays demo test, 10 November 2026.
The Fusion Bonus end screen from spin 68. FluxPlays demo test, 10 November 2026.
How the Fever Wheel pays
The Fever Wheel awards one prize from a fixed list, and the game says its segments do not represent the real odds. It can start from the base game or from a full Fusion Bonus. Fever symbols also land inside the Fusion Bonus as locked prizes, as a Major did in both of ours.
| Tier | Prizes, times the bet |
|---|---|
| Mini | 10x, 20x, 30x, 40x |
| Minor | 25x, 75x |
| Major | 50x, 150x, 250x |
| Grand | 100x, 200x, 300x, 400x, 500x |
One Energy coin was enough to start it on spin 358, and it stopped on Grand.
The Fever prize table in the game's rules. FluxPlays demo test, 10 November 2026.
How to trigger Bonus Spins
Reels 2, 3 and 4 are the only home of the Bonus symbol, and three together award 15 Bonus Spins with an Energy Collector running through. Each set of 1 to 4 coins adds its value, a Multiplier symbol lifts the collector by x2 to x5, and the total pays after the last spin.
Ours took until the final logged spin to arrive and paid $24.80, which makes it the calmer of the two rounds for us.
RTP, volatility and max win
The rules give 96.12%, calculated over 10 billion simulated rounds. Fantasma's page adds lower versions at 94.12% and 92.12%, so the casino's choice matters. High is the studio's own label. Neither the rules nor the game page state a maximum win, so the table leaves it out. The largest listed prize is Grand x5, and a Fusion Bonus adds coin values on top of any Fever prize.
Our Fusion Fever demo test
FluxPlays demo test
10 November 2026, demo running 96.12% (the game's rules; Fantasma Games' page also lists 94.12% and 92.12%) RTP
Base game spins
100
at $1 per spin
Staked
$100
Paid back
$117.20
117.2% of stake, +$17.20
Winning spins
22 of 100
22% of spins paid something
Biggest win
$104.60 (104.6x)
a Fusion Bonus from five Energy coins
Free spins triggered
0
natural triggers in the session
Played on Fantasma Games' official demo, game version 1.0.2, on 10 November 2026 in EUR practice credits read as dollars, at a 1.00 bet from a 10,000.00 balance. The card covers the first 100 paid spins. A further 276 paid spins were logged apart to reach Bonus Spins, for 376 staked and 449.80 returned in all. Spins after the second were started by a script clicking the spin button. Every row matched the game server's replies and the balance on screen. The game has no buy or paid mode. Release date confirmed on the studio's page. Re-check on release day.
Everyday spins barely moved the balance: 21 of the 22 paying spins paid $2.00 or less. The first 100 held no Bonus Spins, so we kept going to 376 paid spins, and that longer run produced the second Fusion Bonus and the Fever Wheel.
Four rounds supplied most of what came back over the whole run. That is far too few bonuses to put a rate on any feature. A Fusion Bonus inside Bonus Spins and the larger Fever prizes did not appear, so those rest on the game text alone.
Spin it for the Fusion Bonus, not the lines
For hold-and-respin players, yes, and for anyone who plays for line wins, no. The appeal is that one opening screen sets the value of every coin that follows, so the first five coins matter more than anything after them.
Wolf Gold is the better-known respin game, with fixed jackpots and stacked wilds. Pick Wolf Gold if you want line play with a respin on top, and this one if you want a board where coin values are set by what triggered it.
In the demo, count the Energy coins on each spin: four is a Multiplier and five is the bonus, so near misses show how close you are.
Frequently Asked Questions
How do you trigger the Fusion Bonus in Fusion Fever?+
Land five or more Energy coins on one spin, in the base game or during Bonus Spins. They lock in place and award 3 respins, and any new Fusion, Multiplier or Fever symbol resets that count. Two arrived from our 376 paid spins, on spins 68 and 215.
What is the max win in Fusion Fever?+
Fantasma Games does not state one, in the rules or on its game page. The largest single prize listed is Grand x5, worth 500x the bet, and a Fusion Bonus adds its coin values on top of any Fever prize, so the true ceiling is not published.
What does the Fever Wheel pay in Fusion Fever?+
It awards one Fever prize, from Mini at 10x the bet up to Grand x5 at 500x. It can start from one to three Energy coins in the base game, by random chance, or from locking all 20 positions in a Fusion Bonus. Ours stopped on Grand from a single coin.
Can you buy the bonus in Fusion Fever?+
No. Fusion Fever has no feature buy and no paid mode, so the Fusion Bonus and Bonus Spins can only arrive from ordinary spins. Both run at the bet of the round that triggered them, which is why we logged extra spins until Bonus Spins appeared.
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