Return to player
96.44%
Minimum bet size
0.20
Type of game
Video Slots
Variance
Low
Number of reels
5
Progressive jackpot
No
Popularity
Maximum bet size
400
Game provider
NetEnt
Bonus features
Yes
Paylines
20
Theme
Fantasy
Golden Grimoire online slot game
Golden Grimoire is a distinctive slot built around magic and mystery. Its play includes a sticky mystery symbol feature, a mystery symbol feature, free spins and wilds—yet every one of these features is hidden from view.
Theme and Story Line
Golden Grimoire takes its theme from the Grimoire, a book of spells. Its enchanted writing sits in a magical chamber, where symbols appear and vanish until the correct formula triggers a spell and produces winning combinations.
Graphics, Sounds, and Animations
Opening the Golden Grimoire online slot transports you to a spell room beside a window for stargazing. Stars turn behind the reels, mysterious magical dust drifts through the air, and candles flicker softly. The reel symbols are carefully drawn and seem to float or bob in place. NetEnt has built the game as a fully animated 3D slot, and the presentation follows that design.
There is a restrained, eerie soundscape. Alongside the reels spinning, you hear creaks in the background and a range of other strangely unsettling noises.
Top Casinos to Play Golden Grimoire:
Gameplay
Golden Grimoire gives you 5 reels and 20 pay lines. Its symbols fall into mystery, medium-win, low-win and wild categories. Select the ‘i’ button to open the paytable, which appears with a magical flash.
The ‘Medium Win’ group features glinting gems bearing symbols, each held by a reptile. These symbols can pay anything between 100 coins and 5 coins multiplied by the ‘Bet Level’. The ‘Low Win’ group uses playing-card suits: spades, hearts, clubs and diamonds, paying from 20 coins down to 3 coins. All symbols form combinations of 3, 4, or 5 only.
At first, those payouts may look modest. The ‘Mystery Symbol’ changes the picture by enabling several wins on one spin. It eventually appears as a thick book marked with a ‘?’. A glowing gold symbol also rolls across the reels: that is the free spins scatter.
Bonuses and Free Spins
Mystery Symbol: The Mystery Symbol appears only during free spins, on reels 2, 3, 4, and 5. On its reveal, the game chooses one medium win, low win or wild symbol, and every mystery symbol on the reels changes into that selection. When the chosen symbol matches the symbol on reel 1 in the same row, each symbol between them changes as well. The wild follows the same rule. The review describes this as a route to a big win, but neither the feature nor any individual result guarantees one.
Free Spins: Land 3 of the scatter symbols on reels 1, 3, and 5 to receive 8 free spins.
Sticky Mystery Symbol: These symbols appear only on reels 3, 4, and 5. They perform the same function as the mystery symbol, but remain in place for the complete free spins round instead of paying and disappearing. Consequently, the mystery symbol’s magical effect is repeated after every free spin, which can create potentially huge wins on individual spins.
Bet sizes, RTP and Variance
Golden Grimoire uses NetEnt’s familiar ‘Level Bets’ and ‘Coin Value’ controls, including some high-stakes wagers. A ‘Level 10’ at a ‘Coin Value’ of 2.00 produces a total spin bet of 400.00. At the other end, ‘Level 1’ and ‘Coin Value’ 0.01 gives a 0.20 spin. Each decrease or increase in ‘Level’ changes the ‘Bet’ value by -20 or 20 coins respectively. The stated RTP is 96.44%, while the reported payout regularity places the slot in the low to medium variance category.
Conclusion
Golden Grimoire uses the mystery symbol in two forms. It can support larger wins in the base game, while its greater impact arrives in free spins, where the sticky version remains on the reels and keeps affecting several symbol combinations. That design may create strong individual results, but a tidy win is not assured.
With 12+ years of experience in the iGaming industry, Evan specializes in reviewing online casinos, analyzing slot games, and evaluating player safety. Their expertise covers casino licensing, RTP, volatility, bonus conditions, and withdrawal policies. Through hands-on testing and independent research, Evan delivers transparent, fact-based reviews to help players better understand gambling platforms, their features, and potential risks.
