Merlin’s Grimoire Slot Review

Expert Rating: 4.5 out of 5
Review by Chris Taylor
Last update 13th May 2022
Review by Chris Taylor
Last update 13th May 2022

Join a young wizard find the ancient book of spells in the Merlin’s Grimoire slot. Created by Play ‘n GO, this 5 reel, 243 ways to win game comes with Splitting Symbols on the 3 middle reels. This can lead to 1,944 ways to win in the base game. It’s all about the Free Spins feature where you’ll play with a special expanding symbol. Splitting Symbols can land on all 5 reels which can result in up to 7,776 ways to win. With a 96.2% RTP rate and 31,104 x bet max wins, enjoy this slice of Arthurian legend with our Merlin’s Grimoire review.

Merlin’s Grimoire Max Win
31,104 x bet
Play 'n GO
Type of Slot
Video Slot
Arthurian Legend
Stakes Range
10p to £100
Bonus Features
Yes (2)
Free Spins/Multiplier
Max Win
31,104 x
Very High

Merlin’s Grimoire Slot RTP, Details & Wager Limits

Reels/Paylines: 5 reels + up to 7,776 ways to win

Stakes Range: 10p to £100 per spin

RTP: 96.2%

Max Win: 31,104 x stake per spin

The Merlin’s Grimoire slot begins with 5 reels, 3 rows and 243 ways to win. Landing 3 or more matching symbols on adjacent reels, starting from reel 1, to get a winning outcome.

You can spin away from 10p to £100 per spin. With 5 bet options appearing under the reels, the plus and minus buttons will allow you to change your stake easily. Non-UK players can use Turbo Mode by clicking on the Lightning Bolt icon at the bottom of the screen. There is also an Autoplay function with up to 100 autospins, single win and loss limits at your disposal.

The Merlin’s Grimoire RTP rate is 96.2%. This is the normal return for a Play ‘n GO slot but just above the 96% slots average. The variance/volatility is very high (9/10).

In terms of winning potential, the maximum win is 31,104 x your total stake per spin. The bigger wins will come in the free spins where you can benefit from up to 7,776 ways to win. The chances of winning the max payout is 1 in 1 billion spins.

Theme – help a young Merlin find the ancient book of spells

Theme: Arthurian Legend

High Value Symbol: Merlin

Compatibility: Mobile, Tablet, Desktop


With an Arthurian Legend theme, the Merlin’s Grimoire slot is part of the expansive series by Play ‘n GO. Following on from the likes of Rise of Merlin, the game is based on Merlin in his younger years before becoming the wise wizard he is known for today. Merlin’s aim is to find the ancient book of spells, the Grimoire, which holds the secrets to the art of magic.

Set in a dark and creepy forest, you’ll see the stone reels covered in moss. With a mystical feel, there’s a movie-like soundtrack stirring as you spin the reels. On the reels you will see 6 icons from Merlin’s Circle. You have Mind, Elements, Motion, Matter, Transformation and Time icons. The higher value symbols include scrolls, potion bottles, gem sceptres and Merlin. Merlin is the best paying symbol with 2, 3, 4 or 5 awarding 0.4, 0.8, 1.6 or 4 x your total bet.

The Grimoire is the wild scatter. Substituting for all symbols, it also pays up to 4 x your total stake for 5 in combination. 3 or more will trigger the Free Spins feature (more details below).

Merlin’s Grimoire Mobile

Play ‘n GO create all slot games with HTML5 technology. This allows for play on mobile, tablet and desktop devices. Merlin’s Grimoire is no difference. With the splitting symbols and up to 7,776 ways to win, it’s recommended you play on a laptop or PC for the best visual experience.

Merlin’s Grimoire Bonus Features

The Merlin’s Grimoire slot benefits from 2 bonus features. The 3 middle reels can give you Splitting Symbols in the base game which can result in 1,944 ways to win. In the Free Spins feature, you can play with unlimited free spins as well as a special expanding symbol. All 5 reels can contain Splitting Symbols which can result in up to 7,776 ways to win.

Splitting Symbols feature

Above the 5 reels, you will see Thunderbolt icons. When any of the Thunderbolt icons on the 3 middle reels light up, the Splitting Symbols feature will be activated. The reels with a lit Thunderbolt icon will see all symbols on the active reel splitting into 2.

With 3 positions on each reel, each of the 3 middle reels could contain 6 symbols each. If all 3 middle reels are lit, this would result in a maximum of 1,944 ways to win on each base game spin (3x6x6x6x3).

Free Spins feature

merlins-grimoire-slot-free-spins feature

The Free Spins feature is triggered when landing 3 or more Grimoire wild scatters anywhere on the reels. With 10 free spins awarded, all 5 reels can benefit from the Splitting Symbols feature. The Thunderbolt icon can randomly light up on all 5 reels as opposed to the 3 middle reels in the base game.

If all 5 reels have a lit Thunderbolt icon, you will have 6 symbols on each of the 5 reels. This can lead to 7,776 ways to win (6x6x6x6x6).

Like classic ‘Book of’ slots, 1 symbol is randomly chosen to become the special expanding symbol. If that chosen symbol can create a winning combination, it will expand to take over the whole reel.

Furthermore, payouts are scatter style and don’t need to appear on adjacent/successive reels. The higher the value of the special expanding symbol, the bigger your potential payouts. Here’s what each symbol can pay at a maximum:

Symbol(s) Max Payout
Mind, Elements + Motion 6,220.8 x bet
Matter, Transformation + Time 7,776 x bet
Scroll + Potion Bottle 19,440 x bet
Gem Sceptre 23,328 x bet
Merlin 31,104 x bet

Finally, landing 3 or more Grimoire wild scatters will result in a retrigger and 10 more free spins. There’s no limit to how many free spins can you win.

Merlin’s Grimoire Review Summary – splitting symbols in free spins can lead to huge wins

Theme & Symbols

Sounds & Music

Bonus Features

RTP (96.2%)

Max Win (31,104 x)


The Merlin’s Grimoire slot goes in another direction to previous slots in the Arthurian Legend series. Well designed as usual, Splitting Symbols have appeared in previous Play ‘n GO slots such as Forge of Gems. In the base game, up to 1,944 ways to win are possible.

However, the action heats up in the Free Spins feature. With a special expanding symbol, all 5 reels have the potential to display Splitting Symbols. This can lead to 7,776 ways to win on each free spin. If you combine 7,776 ways to win with the high value Merlin as the special expanding symbol, payouts of 31,104 x bet are possible on every free spin.

This makes Merlin’s Grimoire stand out against typical ‘Book of’ slots that normally offer 5,000 x bet payouts (i.e. Play ‘n GO’s very own Book of Dead). Comparing to other slots in the series, Merlin’s Grimoire stacks up pretty well:

Slot RTP Max Win
Merlin’s Grimoire 96.2% 31,104 x bet
Rise of Merlin 96.58% 5,000 x bet
Lord Merlin and the Lady of the Lake 96.2% 10,000 x bet
Merlin and the Ice Queen Morgana 96.2% 20,000 x bet

Merlin’s Grimoire will also appeal to fans of Nolimit City slots who use an xSplit mechanic. Games like Tombstone RIP and Remember Gulag offer it.

  • 31,104 x bet max wins
  • Splitting symbols in base game + free spins
  • Combines splitting and special expanding symbols with free spins
  • Extremely high volatility

Merlin’s Grimoire FAQs

What is the Merlin’s Grimoire RTP?

The Merlin’s Grimoire RTP rate is 96.2%. Above the 96% norm for an online slot game, the volatility is very high (9/10).

What’s the Captain Xeno’s Earth Adventure max win?

The maximum win per spin is 31,104 x your total bet. This can be won in the free spins when playing with 7,776 ways to win and filling the reels with the high value Merlin symbol.

Are there any Merlin’s Grimoire free spins?

Yes, the Free Spins feature begins with 10 free spins. With a special expanding symbol, all 5 reels can give you Splitting Symbols that can lead to 7,776 ways to win. There’s also unlimited extra free spins to be won.

Is there a Merlin’s Grimoire demo?

Yes, the Merlin’s Grimoire free play version is available here at Join a young Merlin on quest to find the ancient book of spells on desktop, mobile and/or tablet devices.