This guide to the Rise of Merlin slot explains its RTP versions, its maximum win and the UK stake limit. To put it briefly: one RTP value is verified while a much lower one is documented. The advertised maximum win is frequently mentioned but not confirmed by the provider. And the stake ranges listed on numerous review sites can't be played in Great Britain.
The basics
Rise of Merlin is a video slot from Play'n GO themed around Arthurian fantasy. Review sites concur that it features a grid of three rows and five reels, ten paylines, and high volatility. These sites also agree that a Magical Orb serves as both Scatter and Wild, and that an expanding symbol is added during a Free Spins round. The game page from Play'n GO confirms the Free Spins and the Orb. It doesn't mention the volatility, the layout, or a maximum win.
What Play'n GO's page confirms
Play'n GO lists the launch date as 17 June 2019. A free demo is available on its page, which states that you don't need to make a purchase to play.
The rules for features are more precise than what most reviews state:
- Triggering Free Spins. Eight Free Spins are granted for three or more Magical Orbs. Payouts are also given based on the quantity of Orbs appearing on the reels.
- Retriggers. Another eight spins are added with every retrigger.
- Expanding symbol. One symbol is randomly selected to expand when Free Spins begin.
- When it expands. Two additional matching symbols on the reels are required for a high-paying selected symbol. At least three more are needed for a low-paying one.
- How it pays. Standard wins for the spin are collected first when the symbol expands, followed by any wins from the expanded symbol.
A low symbol results in a less generous round because low-paying symbols require one more match to expand.
A further expanding symbol is added by retriggers according to some reviews. The page from the provider doesn't state this; it only mentions the additional eight spins.
RTP versions: which figure is right
RTP values differ on review sites, ranging from 96.58% to 91.51%. The figure verified against Play'n GO is 96.58%, which the RTP Ledger lists as the game's primary theoretical RTP.
That same ledger also mentions 84.55% as a reduced version. It states that the origin of this lower value isn't documented.
Review pages show other lower percentages, but none are verified. No evidence provides a full list of versions or identifies a default.
The casino chooses, and you can check
The operator selects the RTP version to use, and the game's appearance remains identical regardless. According to the RTP Ledger, the current figure is located in the information screen or paytable of the game. It isn't confirmed that every casino displays it in the same spot. Look at the information screen for the game you are actually offered.
What the gap costs
On average, play costs the stake multiplied by the house edge, which equals 100% minus the RTP. This represents a long-run average rather than a prediction. A single session can end at any point.
| Play | Staked | Cost at 96.58% | Cost at 84.55% |
|---|---|---|---|
| 100 spins at £0.20 | £20.00 | £0.68 | £3.09 |
| 100 spins at £1.00 | £100.00 | £3.42 | £15.45 |
For 1,000 spins at £1.00, the 84.55% version costs £120.30 more on average than the 96.58% version. At the same stake, the lower version takes roughly four and a half times as much over time.
Maximum win: why figures differ
A 5,000× the total bet figure is cited by most pages. One review instead mentions a 250,000 coin limit, based on a Play'n GO comment. According to that interpretation, the 5,000× multiplier works at the maximum lines and coins, while lower coin settings result in a different multiplier.
Neither value is listed on the provider's game page. View 5,000× as the top win frequently reported at full stake, rather than a confirmed fixed multiplier.
Stakes in Great Britain
Rise of Merlin is a video slot, meaning any casino with a licence in Great Britain must apply the online slots stake cap to it:
- Aged 25 and over: a maximum of £5 per game cycle, active since 9 April 2025.
- Aged 18 to 24: a maximum of £2 per game cycle, active since 21 May 2025.
According to reviews, the minimum is around £0.10 for all lines. This creates a playable range of approximately £0.10 to £5, or £0.10 to £2 for younger adults.
Other quoted ranges reaching £100 per spin aren't applicable to legal play in Great Britain. You simply can't place a stake that exceeds your cap.
Bonus buy
No reviewed source indicates that Rise of Merlin includes a bonus buy, meaning there isn't a distinct buy price or buy RTP to list. According to Gambling Commission guidance, a stake is any amount risked or paid in relation to the game. If a version were to offer a paid feature, that cost would be included in the same cap.
How the GB version plays
The technical standards from the Gambling Commission determine the way the game functions at a licensed operator. No planned modifications to these regulations are listed on its page.
- No autoplay. You must manually trigger every spin (RTS 8A).
- No speed-up controls. Slam stop, quick spin and turbo are prohibited (RTS 14E).
- No false celebrations. Win animations or sounds cannot mark a return that is equal to or less than your stake (RTS 14F). The game remains silent if a 20p spin pays back 10p.
- Minimum spin time. A gap of at least 2.5 seconds is required between the start of one spin and the start of the following one. The 5-second rule applies to other casino games rather than slots.
These rules give each spin a natural pause. Use that pause to ensure your play stays within a budget you decided before you began.