Rise of Merlin is a fantasy-themed online slot developed by Play'n GO, released in June 2019. Set inside the sorcerer's candlelit chamber, the game draws on Arthurian legend and centres its mechanics around a single high-impact feature: an expanding symbol during free spins that can fill entire reels. It remains one of Play'n GO's most popular titles for players who favour high volatility slots with straightforward mechanics and significant win potential.
You can play Rise of Merlin at Mega Casino, which is licensed and regulated by the UK Gambling Commission (UKGC), Licence Number 39326. The game sits within a library of over 7,000 titles from 50+ providers, accessible on desktop and via the iOS and Android apps.
Important RTP note: The default Rise of Merlin RTP is 96.58%, but Play'n GO allows operators to configure lower RTP variants, including 94.51%, 91.51%, and lower settings. The exact RTP configured at Mega Casino must be verified and confirmed before this page goes live. The figure published here will reflect the specific setting active on this platform. RTP is always a theoretical figure calculated over millions of spins; it is not a guarantee of returns on any individual session, and outcomes on every spin are determined entirely by the random number generator (RNG).
The Rise of Merlin slot places you inside a stone-walled study filled with arcane artefacts, flickering candles, and leather-bound spell books. The colour palette leans towards deep blues and golds, giving the game an atmospheric, slightly moody quality that distinguishes it from the brighter, more cartoonish fantasy slots in the Play'n GO catalogue. Symbol artwork includes Merlin himself, a sorceress, owls, spell books, and standard card royals rendered in a gothic serif typeface. The audio design is restrained, with an understated orchestral backdrop that intensifies during Rise of Merlin free spins.
Visually, it shares DNA with Play'n GO's Book of Dead, which is intentional. Both games use the same 5x3, 10-payline grid structure and belong to the same family of "book-style" slots that originated with Novomatic's Book of Ra. The Arthurian setting gives Rise of Merlin its own identity, but experienced players will recognise the mechanical blueprint immediately.
The crystal orb is the defining symbol in the Rise of Merlin slot. It functions as both the wild and the scatter, meaning it substitutes for all other symbols to complete winning combinations and also triggers the free spins round. When three or more crystal orbs land anywhere on the reels in a single spin, the free spins feature activates.
The expanding symbol mechanic is where the 5,000x maximum win becomes achievable. If a high-value expanding symbol fills multiple reels across an active payline, payouts compound quickly. With two or more expanding symbols active after a retrigger, the theoretical ceiling of the game opens up considerably. That said, reaching maximum win territory requires a specific combination of high-value symbol selection and favourable reel positions, and outcomes remain entirely random on every spin.
Players familiar with Play'n GO's catalogue will immediately notice the structural similarities between Rise of Merlin and Book of Dead, the provider's most successful slot. Both games share identical grid layouts (5 reels, 3 rows, 10 paylines), the same expanding symbol free spins mechanic, and an identical 5,000x maximum win. The core gameplay loop is effectively the same: land three scatters, receive free spins, and hope the randomly selected expanding symbol delivers full-reel coverage on a paying line.
The differences are in theme, volatility profile, and symbol values. Book of Dead uses an Egyptian exploration theme with Rich Wilde as its protagonist, while Rise of Merlin opts for the Arthurian fantasy setting. Both are classified as high volatility, but their payout distribution profiles differ slightly. Book of Dead has a marginally higher default RTP of 96.21% compared to Rise of Merlin's 96.58%, though both figures are theoretical and subject to operator configuration. In practical terms, the games will feel similar during a session, with long stretches between significant wins punctuated by the potential for large payouts during the free spins round.
If you have played and enjoyed Book of Dead, Rise of Merlin offers the same core mechanic in a different setting. It is worth trying both to see which theme and pay table you prefer. Both are available in the online slots library at Mega Casino.
Rise of Merlin Play’n GO is a high volatility slot, which means wins tend to be less frequent but potentially larger when they do occur. This profile suits players who are comfortable with longer dry spells between payouts and who set their session budgets accordingly. The adjustable paylines (1 to 10) and wide bet range of £0.10 to £100 per spin offer flexibility, but the high volatility nature of the game does not change regardless of stake level or payline configuration.
The game's appeal sits squarely with players who enjoy "book-style" mechanics: a simple base game with low complexity, a single bonus feature that carries all of the game's win potential, and a straightforward expanding symbol concept that is easy to follow. There are no multi-level bonus rounds, no pick-and-click features, and no progressive jackpot. The entire game revolves around the free spins trigger and what happens once the expanding symbol is selected.
Players who prefer frequent, smaller wins or multi-feature bonus structures may find the base game sessions in Rise of Merlin unrewarding. This is a game built around patience and the anticipation of the free spins round, not consistent base game returns.
Rise of Merlin Play’n GO is available to play at Mega Casino on desktop and mobile. The site offers over 7,000 games from 50+ providers, and the Rise of Merlin slot is accessible directly through the slots lobby. Mega Casino operates under UKGC Licence Number 39326, held by Skill On Net Limited, with a minimum deposit of £10. Live chat support is available from 6 am to midnight daily, and iOS and Android apps are available for mobile play.
Play Rise of Merlin at Mega Casino. 18+ | Play Responsibly.
Gambling should only ever be treated as a form of entertainment for adults, not as a way to make money. All slot outcomes are determined by RNG and are entirely random. If you are concerned about your gambling habits, visit GambleAware or register with GAMSTOP to self-exclude from all UKGC-licensed gambling sites.
The maximum bet that can be placed in the Rise of Merlin slot game is £100.
The lowest bet players can get the reels of the Rise of Merlin slot game spinning for is £0.10.
Of course. Rise of Merlin has been fully optimised to work across a number of different devices and platforms.
The RTP of the Rise of Merlin slot game is 96.58%.
The biggest potential win on offer in the Rise of Merlin slot game is 500x the player’s stake.