The Expanding Symbol Engine at the Heart of Rise of Merlin
Rise of Merlin, released in June 2019 by Play'n GO, is built entirely around one core mechanic: expanding symbols during Free Spins. This is not a slot with a bonus feature bolted onto a base game; the Free Spins feature IS the game, and its execution defines whether this title delivers.
The slot plays across 5 reels, 3 rows, and 10 paylines. The Magical Orb serves dual duty as both scatter and wild symbol, and it is the key that unlocks everything that matters. When players land three or more Magical Orbs on the reels, they trigger the Free Spins feature and immediately begin to understand why this game has held player interest since its launch. The initial award is eight Free Spins, but the real depth lies in what happens during those spins.
How Expanding Symbols Transform the Free Spins Feature
During Free Spins, a single symbol is chosen at random to act as the expanding symbol for that spin session. When this chosen symbol lands alongside 2 or more matching symbols (for high-paying symbols) or 3 or more matching symbols (for low-paying symbols) on the same reel, it expands to fill that entire reel. Expansion creates new winning combinations across the paylines, and because the expanding symbol can land multiple times across a single spin, the potential for consecutive multi-reel expansions within a single free spin is genuine.
What elevates this mechanic beyond a simple free-spin bonus is retriggering. Land three or more Magical Orbs again during Free Spins and the feature adds another eight spins to the bank plus an additional expanding symbol for that new batch. Retriggering can happen up to 9 times, meaning a lucky run can stretch from the initial 8 free spins to a theoretical maximum of 80 spins with multiple expanding symbols stacked and firing across the session. Each retrigger introduces a fresh expanding symbol, so later in a long free-spin sequence, players may have three or four different symbols expanding simultaneously, multiplying the complexity and the payout potential.
Volatility and Realistic Win Ceilings
Rise of Merlin is classified as high-volatility. The max win reaches 5000x, achievable through a combination of expanding-symbol multipliers during an extended free-spin run with multiple retriggering cycles. On a $1 spin, the theoretical ceiling sits at $5000. Independent sources have logged real player wins well below that ceiling; our live bet feed at RTPspy has recorded the biggest observed win on this slot at 781x, which reflects the actual variance in how often the expanding-symbol combinations fire together at scale.
The base game between free-spin triggers is lean, paylines and symbol matches matter, but they function chiefly as a vehicle to land the Magical Orbs and reach the feature. Hit rates on the base game are moderate; the real action concentrates in Free Spins, where volatility spikes dramatically. This design choice means long stretches without a significant win are normal, but when Free Spins arrive and retrigger, the upside can be substantial.
Who Rise of Merlin Is Built For
This slot suits players who prefer a single, well-executed mechanic over a suite of competing bonuses. The expanding-symbol feature is intuitive: watch which symbol gets chosen, count the matches, see it expand, and anticipate the payout. There is no complexity tax, no hidden ruleset. The Arthurian legend theme, Merlin and his magical orb, threads through the visuals without distracting from play.
Because of its high volatility and retrigger ceiling, Rise of Merlin appeals to players seeking longer, extended play sessions within a single bonus round rather than frequent small wins. The theme and mechanic stability also make it accessible to newer players exploring Play'n GO fantasy slots, though the variance demands a bankroll mindset suited to multi-spin stretches without returns.
Rise of Merlin remains a solid entry point into expanding-symbol gameplay and continues to hold its own as a reliable high-volatility option nearly five years after launch.
Bottom Line
Whether Rise of Merlin is worth your time depends on your tolerance for variance and how the theme reads to you. Players who want the slot's specific feature mix and accept the volatility profile will find consistent engagement here; players who prefer steadier, lower-ceiling action should look at lower-volatility alternatives. The math model and feature design tell you who this is for, the choice to spin is yours.
