Merlin's Fortune

Merlin's Fortune is a six-reel avalanche slot from Slotmill, released in September 2021, that can expand up to eight symbol rows and drive its number of betways as high as 262,144 once its Merlin's Expansion feature kicks in. It's a genuinely ambitious structure for a wizard-themed release, built to scale up dramatically from a more modest starting point.

How Merlin's Fortune plays

The base game opens with a lower betway count that climbs as the grid expands, topping out at 262,144 betways at maximum size. Wins trigger an avalanche sequence, clearing winning symbols from the board and letting new ones fall into place for a chance at further consecutive wins within the same spin. Landing two Bonus Symbols triggers Merlin's Substitution, which upgrades every low-value symbol on the board into its corresponding medium-value symbol, opening up fresh winning combinations on the spot. Free Spins are triggered by three or more Bonus Symbols and award up to 16 spins, during which royal symbols are collected and removed at set thresholds to unlock extra rows, additional spins, and multipliers as the round progresses.

Theme and presentation

The game is set within a mystical world of magic and sorcery, with Merlin himself guiding proceedings from the reels. Enchanted books, glowing potions, and runic symbols make up the visual set, while the animation work emphasises the avalanche drops and grid expansions, and an adventurous soundtrack keeps the mystical tone consistent throughout.

RTP, volatility and buying in

Merlin's Fortune carries a strong RTP of 96.27%, comfortably above the typical fairness benchmark, and it's rated high volatility. Players who'd rather skip ahead can use one of several buy-in options, including Fast Track for direct access to the bonus features or a dedicated Free Spins Buy, alongside a Burst Mode that speeds up auto-play to two rounds per second.

Max win and stakes

The game's headline figure is a maximum win of 10,000 times the stake, a strong ceiling that rewards riding out the volatility as the grid expands and multipliers stack. Stakes run from 0.20 up to 30 per spin, giving a reasonably wide betting range to work with.

Tracking the expansion as you play

Because the betway count shifts so dramatically between its base state and its fully expanded 262,144 form, it's worth paying attention to the on-screen indicator that shows the current number of active betways during play, rather than assuming every spin offers the maximum. That extra bit of awareness helps make sense of why some spins feel far more eventful than others even at the same stake.

Verdict

Merlin's Fortune stands out through its genuinely scalable grid and multi-stage Free Spins structure, backed by a dependable RTP and a solid max win. Fans of avalanche mechanics and expanding-grid slots should try the free demo at johnessyslots before deciding whether to play Merlin's Fortune for real money.