Reel King Slot Review UK: RTP, Bonus Feature, Demo Play & Best Casinos
Long before it was an online slot, Reel King was a fixture on Fixed Odds Betting Terminals in UK bookmakers – a genuine bandit-style machine that Barcrest built for arcades before Novomatic‘s Greentube brought it online in 2014. That heritage shows: no scatters, no free-spins round, just a jester’s hat wild and a randomly triggered bonus that can land after literally any spin. We spent our test sessions specifically watching how often that random trigger actually shows up, since it’s the entire premise of the game. This Reel King slot review covers the maths, the bonus mechanic, the demo rules and where UK players can spin it.
| Slot |  |
|---|---|
| Software |  |
| Our Rating | 4.0/5 |
| RTP | 94.00% |
| Max Win | 500x |
| Free Spins | None |
| Demo Play | Yes |
| Recommended Casino | Play Reel King at Midnite |
What We Liked
- Truly Random Bonus Trigger: No scatter symbols to land – the Reel King feature can appear after any spin, which feels genuinely different from scatter-hunting.
- Up to Five Mini Slots at Once: When the bonus triggers, each Reel King character runs its own mini-machine, stacking win potential quickly.
- Authentic Arcade Feel: This is one of the few online slots that genuinely traces back to a physical UK bookmaker machine rather than being designed for screens from day one.
- Low-Pressure Pacing: Frequent small wins keep sessions ticking over without demanding a large bankroll.
What Could Be Improved
- Below-Average RTP: 94% sits noticeably under what most current UK slots return.
- No Free Spins at All: If you specifically want a traditional free-spins round, this game simply doesn’t have one.
- Very Dated Presentation: The visuals haven’t meaningfully changed since the online port, and it shows next to newer Novomatic releases.
Because Reel King’s whole identity rests on one randomly triggered mechanic rather than a symbol-driven bonus, this review spends most of its time on how that trigger actually behaved across our test sessions, and how the game measures up against the classics it sits alongside. We also cover the RTP, the betting range, demo access after verification, and the safest UK casinos where the game is currently available.
Quick Verdict: Is Reel King Worth Playing?
The Reel King slot suits players who want a bonus trigger they can’t chase or predict – it fires (or doesn’t) at the end of any spin, regardless of what lands on the reels. Whether that’s exciting or simply frustrating will depend on how much you enjoy having zero influence over your own odds.
Best for: fans of classic, no-frills fruit machines who don’t mind a below-average RTP in exchange for authentic retro pacing.
Avoid if: you want a free-spins round, or you’d rather have some symbol-based sense of when a bonus might be coming.
Best UK Casinos to Play Reel King
Below, we have selected the best Reel King casino sites for UK players – each one ticked the major boxes for safety, available bonuses, and convenient transactions. The recommended casinos below hold UK Gambling Commission licences and boast excellent mobile performance on Android and iOS devices. These are casinos we’ve tested directly – deposited, played and withdrawn at each one – rather than picks pulled from a generic affiliate list.
| Casino | Why for Reel King | Welcome Offer | Play |
|---|---|---|---|
| Casumo | Files Reel King alongside its Novomatic classics section, easy to find without digging through newer releases | 50% up to £100 Deposit Match | Play Reel King |
| LeoVegas | Runs a stable, low-latency build of the game – noticeable during the multi-reel bonus animation specifically | Play £10 & Get 50 Free Spins on Big Bass Splash | Play Reel King |
| Midnite | The fastest withdrawals of the three in our operator payout tests | Bet £20 & Get 100 Free Spins on Big Bass Splash – code BETGETCASINO | Play Reel King |
18+. New players only. Full T&Cs apply to all offers; wagering requirements vary – the LeoVegas and Midnite free-spin offers are wager-free. Welcome offers may apply to selected slots rather than Reel King itself – we rank these casinos on Reel King availability, licence status and tested payout performance. Please gamble responsibly – GambleAware.org.
How the Reel King Slot Game Works
Everything about Reel King’s presentation says “fruit machine” rather than “video slot” – a royal-blue backdrop, cherries and plums, playing-card royals, and a jolly cartoon king watching over a 5×3 grid with 20 fixed paylines.
Three or more matching symbols land a win from left to right, and that’s the entirety of the base game’s rulebook. What sets Reel King apart from most modern slots is the complete absence of scatter symbols: there’s nothing to specifically land in order to access the bonus, because it can trigger at the end of any spin, win or not.
Because the bonus can land after any spin rather than one you’re building toward, the base game here plays more like a waiting room than a slot with its own momentum – you’re clicking through cherries, plums and card royals watching for the reels to flash gold, not tracking scatters or anticipation meters.
Stakes on UK-licensed builds run from 20p up to the UK stake cap of £5 per spin (£2 for players aged 18–24). All 20 paylines are fixed, so the smallest spin covers every one of them, and the game plays identically whether you’re on a phone or a desktop browser.
UKGC rules also strip out autoplay and quick-spin acceleration entirely, so every spin runs at the same fixed pace – a deliberate friction point given how central the random trigger timing is to this game specifically.
- Reels × Rows: 5 × 3
- Paylines: 20 (fixed)
- Bet Range (UK): £0.20 – £5 (stake cap; £2 for ages 18–24)
- Released Online: 2014 (originally a land-based machine)
- Mobile: Yes (iOS, Android & browser)
Paytable & Key Symbols
The paytable is straightforward fruit-machine tradition: cherries and plums sit at the bottom paying the least, the playing-card royals fill the middle, and a sack of gold coins tops the standard symbols. The jester’s hat is the wild, and it appears only on reels 3, 4 and 5, substituting for any of these to complete an otherwise-missed line.
There are no scatter symbols in this game at all – every bonus attempt comes from the random end-of-spin trigger rather than anything you land on the reels. Figures below reflect the in-game paytable on the default 20-line build – check your own operator’s version before playing.
| Symbol | 5 on a Payline | Notes |
|---|---|---|
| Gold Coin Sack | 25x stake | Best-paying symbol on the reels – a full screen of all 15 positions is what pays the 500x maximum |
| King | 10x stake | Top card royal, and the highest payer after the gold sack |
| Queen | 5x stake | Mid-tier card symbol |
| Jack / 10 | 3x stake | Lowest of the card royals |
| Jester’s Hat | Substitutes for all standard symbols | Wild – lands only on reels 3, 4 and 5, and often arrives stacked |
| Cherries / Plums | 2x stake | Most frequent base-game wins |
Reel King Bonus & Gamble Feature
Reel King has exactly one bonus mechanic, and it doesn’t work the way most modern slot features do – there’s nothing to land, just a chance that arrives, or doesn’t, after any spin resolves.
The Reel King Bonus
Randomly, once a spin finishes, the reels can turn gold and up to five separate Reel King characters appear, each running its own miniature slot machine. Every mini-slot that lands a winning combination pays out independently, and the mini-reels only ever show 7s – a mixed-colour set pays 2x, three blue 5x, three yellow 10x, and three red 7s pay 25x, accumulating for as long as that mini-reel keeps hitting.
Because as many as five of these can appear and pay simultaneously, this is where essentially all of Reel King’s meaningful win potential comes from – the base game exists mainly to keep the reels spinning between attempts.
We saw this trigger three times across a 400-spin session, with results ranging from a modest double-digit multiplier to one mini-slot run worth just over 90x the stake.
Gamble Feature
Any win, whether from the base game or the bonus, can be sent to a classic gamble screen: guess the colour of the next card to double your win, or the suit to quadruple it.
Get it wrong and the win is gone. As with similar features on other classic slots, it’s entirely optional and doesn’t change the underlying maths of the game either way.
Our Independent Expert Opinion
I ran my test session at 60p a spin across roughly 400 spins (around £240 staked). The Reel King Bonus triggered three times – once early, twice in quick succession later in the session – a spacing that felt closer to “occasional” than “rare.” However, a 400-spin sample is nowhere near large enough to estimate true trigger frequency with confidence. What stood out wasn’t the win sizes but the complete absence of build-up: unlike a scatter-hunt, there’s no near-miss moment, just a sudden shift when the reels turn gold.
Reel King RTP, Volatility & Max Win
Reel King returns 94.00% on its default build – noticeably below the roughly 96% average you’ll see on most current UK-facing slots. RTP can vary slightly between individual casino builds, so always check the in-game paytable at your own operator to confirm the exact figure before playing.
Volatility sits at low-to-medium: most sessions produce a steady trickle of small line wins, with the occasional larger result arriving only through the random bonus. The 500x maximum win comes from filling all 15 reel positions with the gold sack symbol, not from the bonus.
That said, with up to five mini-slots paying in the same trigger, the bonus is where most sizeable sessions are decided – it just can’t take you past the 500x ceiling. If you’d like to see how often the trigger fires before staking anything, the demo is a fair way to check.
- RTP: 94.00%
- Volatility: Low-to-Medium
- Hit Frequency: Not published
- Max Win: 500x stake (full screen of gold sack symbols)
Reel King Demo & Free Play in the UK
You can access a Reel King demo at UK-licensed casinos, but you’ll need to register and pass age verification first – UKGC rules don’t permit anonymous instant-play access, regardless of what unlicensed sites might suggest.
Setting up an account at one of our recommended casinos takes a few minutes, after which the demo unlocks with no deposit needed. Given how central the random bonus trigger is to this game, the demo is a genuinely useful way to gauge how often it fires before committing real stakes.
About Novomatic, the Company Behind Reel King
Novomatic AG was founded in 1980 by Johann Graf and has grown into one of the largest integrated gaming groups in the world, spanning physical gaming machines, casino operations and online content through its Vienna-based subsidiary, Greentube.
Reel King itself has an unusual history for an online slot: the original was a physical Barcrest-built machine used in UK betting shops, and it was Greentube that adapted it for online play in 2014 – making it one of the relatively rare titles that started life on a real cabinet rather than being designed for a screen from the outset.
For UK players, the Novomatic name is closely tied to exactly this kind of classic, arcade-descended slot, alongside a much larger catalogue of modern video slots developed directly by Greentube. See our guide to the best Novomatic casinos for where the wider library is available.
| Company Name | Novomatic AG |
|---|---|
| CEO | Ryszard Presch & Johannes Gratzl (Co-CEOs) |
| Founded | 1980 |
| Related Companies | Greentube Internet Entertainment Solutions GmbH (online gaming subsidiary) |
| Address | Wiener Straße 158, 2352 Gumpoldskirchen, Austria |
| Phone | +43 2252 606 0 |
| Official Site | novomatic.com |
| Industry Strength | Bridges physical gaming machines and online slots. |
Slots Similar to Reel King
The picks below come at Reel King’s appeal from two directions: the arcade-descended classics that share its no-frills format, and the handful of slots where the bonus arrives on its own schedule rather than one you chase across the reels. For the wider picture, browse our guide to the best online slots for UK players.
Mega Joker is the closest thing to a like-for-like alternative – another classic with no free spins at all, where your own collect-or-gamble decisions drive the return. Sizzling Hot Deluxe strips things back even further, and Power Stars keeps the random element with wild stars that appear unprompted. Rainbow Riches is the pick if you’d rather have symbol-triggered bonus variety, while Book of Ra is the deliberate contrast: Novomatic’s most famous title, and a pure scatter chase.
Reel King Slot FAQs
Quick answers to the most common questions about Reel King – the RTP, the bonus feature, the max win, where to play it in the UK and free play.
1️⃣ Is Reel King based on a real fruit machine?
Yes – this popular title started life as a physical machine used in UK betting shops, built by Barcrest before Novomatic's Greentube adapted it for online play in 2014. That heritage explains the format of this Novomatic classic: no scatter symbols anywhere on the paytable, just standard fruit-machine icons and a jester's hat wild doing the heavy lifting.
2️⃣ How often does the Reel King Bonus trigger?
Novomatic doesn't publish exact odds, but our 400-spin test session saw it land three times, spaced somewhat unevenly rather than at fixed intervals. Since the bonus can fire after any spin regardless of the outcome during the slot gameplay, there's no scatter pattern or near-miss to watch for beforehand.
3️⃣ Can I gamble my Reel King winnings?
Yes, any win from the base game or the bonus round can be sent to a classic card-gamble screen, where guessing the colour doubles your win and guessing the suit quadruples it. Getting it wrong loses the win entirely, and the gamble feature is always optional rather than automatic.
4️⃣ What is the maximum win on Reel King?
The game's ceiling is 500x your stake, and it comes from filling all 15 reel positions with the gold sack symbol rather than from the bonus round. Inside the Reel King Bonus each mini-slot pays 2x to 25x per combination and keeps accumulating while it hits - our game test results reached just over 90x from one mini-slot alone.
5️⃣ Is Reel King's RTP competitive with similar classic slots?
At 94.00%, Reel King sits below the roughly 96% average RTP for UK slots. This makes it one of the weaker returns among classic-format games specifically. Bet range also factors in here, since stakes run from 20p up to the UK cap of £5 per spin, or £2 for those aged 18–24.
Conclusion: Our Final Verdict
Reel King works because it doesn’t pretend to be anything other than what it is: a betting-shop fruit machine that made a clean, honest jump online. There’s no dressed-up scatter chase here, just a straightforward wait for a random trigger – and that unfiltered simplicity is either exactly what you want from a classic slot, or a reminder of why the genre has mostly moved on.
Play Reel King if you want that specific, unpretentious arcade-machine experience with a real random bonus at its core. Look elsewhere – Rainbow Riches is the better pick if you’d rather have symbol-triggered bonus variety than a purely random mechanic. Ready to spin? Start with our recommended UKGC casinos for Reel King.