Reel King Slots Review - Classic 5-Reel Fun, Gamble Feature & Reel King Bonus

Reel King Slot - Editor's Comment

Reel King is one of those slots that feels like it has been around forever, and in a good way. It is a Greentube release built on the classic Novomatic fruit-machine formula, and it does not try to be anything it is not. There are no cascading reels, no Megaways and no elaborate story. What you get is a clean five-reel game with up to 20 paylines, a gamble feature and the Reel King bonus that gives the game its name.

The appeal here is straightforward. Players who grew up with pub fruit machines will recognise the rhythm immediately. The symbols are familiar, the paytable is easy to read and the Reel King feature can trigger at random between spins, which keeps things interesting without demanding much from you. The trade-off is that the RTP is on the lower side compared with many modern online slots. RTP is a long-run theoretical average, not a prediction for any single session.

It is also worth separating the real-money Greentube slot from the Funstage social app that shares the Reel King name. The app uses virtual currency called Twists and is for entertainment only, so it cannot pay out real money. If you are looking for the actual casino game, make sure you are on a regulated operator's version supplied by Greentube.

What We Liked

• The Reel King feature can trigger at random, adding a genuine element of surprise to an otherwise simple game.
• The gamble feature gives players a clear, optional way to try to double a win, with the obvious risk that a loss forfeits that round's winnings.
• The classic fruit-machine presentation is easy to read and quick to understand, which suits casual players.
• Up to 20 paylines and a flexible bet range make it accessible without being overly complicated.

What is the Reel King Slot?

Reel King is a five-reel, three-row video slot developed by Greentube, the online arm of Novomatic. It uses up to 20 paylines and is built around a classic fruit-machine theme with cherries, plums, playing-card symbols and a crown-wearing King. The game's headline attraction is the Reel King feature, which can appear at random and takes you to a separate three-reel mini slot with a Lucky Seven symbol added to the mix.

The game is widely available at regulated online casinos that carry Greentube content. In Ireland, that means operators licensed by the relevant authorities, and you should always check the licence details on the casino's own terms pages before playing. Reel King is also part of a larger family that includes Reel King Potty, Reel King Megaways and 4 Reel Kings, but this review covers the original game only. Details from those sequels should not be applied to this version.

There is also a separate Reel King social app published by Funstage for GameTwist. That app uses virtual Twists, is rated 18+ and explicitly states that it is for entertainment purposes only and cannot pay out real money. It is a different product from the Greentube casino slot, even though the name and theme overlap.

Reel King Slot Machine At A Glance

The table below summarises the core specifications of the original Greentube Reel King slot. Where a figure is not confirmed by the game's published information, it is left out rather than guessed.

The 500x figure appears in the Funstage social app description and refers to that app's virtual-currency version, not the Greentube real-money slot. Always check the specific casino's terms and the game's in-game help for the most accurate details on bet limits and prize potential.

Reel King Slot RTP, Payout and Volatility

RTP stands for return to player and represents the theoretical percentage of all wagered money that a game is designed to pay back over a very large number of spins. It is a long-run average, not a guarantee, and it does not mean you will get a specific percentage of your stake back in any given session. Short-term results can vary widely.

Reel King's RTP is on the lower side compared with many modern online slots, which often publish RTP figures in the 94% to 96% range. That is not unusual for a classic fruit-machine style game, but it is worth knowing before you play. You should always check the in-game help or paytable on the version you are playing, as RTP can vary between jurisdictions and operator configurations.

Volatility is not confirmed in the available game information, so we have not assigned a rating. In practice, the game's payout structure is weighted towards smaller, more frequent wins from fruit symbols, with the Reel King feature offering the main chance of a larger return. The gamble feature can multiply a win, but a loss forfeits that round's winnings entirely.

How to Play Reel King

Reel King is a straightforward game to pick up, whether you are new to slots or have been playing for years. The controls are standard for a Greentube release.

1. Set your bet. Use the controls at the bottom of the screen to choose your stake per line and the number of active paylines. Your total bet is the number of active lines multiplied by your bet per line.
2. Choose your paylines. Reel King supports up to 20 paylines. You can reduce the number of active lines, but only active lines can produce winning combinations.
3. Spin the reels. Press the spin button to play a single round, or use the auto-spin option if you prefer a set number of automatic spins.
4. Check for wins. Winning combinations are read from left to right along active paylines, and you need at least three matching symbols on a line to win.
5. Consider the gamble feature. After a win, you may be offered the chance to gamble it on a 50/50 bet. Winning doubles the amount; losing forfeits the entire win for that round.
6. Watch for the Reel King. The Reel King feature can trigger at random between spins. When it does, you play a separate three-reel mini slot with a Lucky Seven symbol, and the result determines your bonus prize.

There is no strategy that can change the outcome of a spin. The reels are driven by a random number generator, and each spin is independent of the last. Managing your bankroll and choosing a stake you are comfortable with is the only meaningful decision you control.

Reel King Gameplay, Graphics & Sound

Reel King leans into its fruit-machine heritage. The reels are set against a simple backdrop, and the symbols are the familiar mix of cherries, plums, playing-card values and the King himself. The Gold Coins symbol is highlighted in the social app description as having a particularly high win value, and the overall presentation is bright and easy to read rather than flashy.

The graphics are functional rather than cutting-edge. This is a game that prioritises clarity over spectacle, which suits its pick-up-and-play style. Animations are modest, with winning symbols lighting up to show the payline. The sound design follows the same approach: classic slot effects and a simple soundtrack that does not overwhelm the experience.

For players used to modern video slots with elaborate intros and cinematic bonus rounds, Reel King may feel dated. For players who want a quick, uncluttered game with a recognisable feel, that is part of the charm. The game runs in a browser without a download on the operator side, and the separate Funstage app is available for iOS and Android for the social version.

Reel King Slot Features

Reel King keeps its feature set tight. There are no free spins in the traditional sense, no expanding wilds and no pick-me bonus games. What you get is a small number of mechanics that define the game.

• Wild symbols. The Joker acts as a wild and can substitute for other symbols to help complete winning combinations on active paylines.
• Gamble feature. After a win, you can choose to gamble it on a 50/50 bet. A correct guess doubles the win; an incorrect guess forfeits it. This is optional and carries real risk.
• Reel King feature. The signature bonus, triggered at random between spins. It takes you to a separate three-reel mini slot with a Lucky Seven symbol, and the outcome determines your prize.

The game's published information also notes that the specific rules have changed over time, so you should always check the paytable on the version you are playing for the most accurate details on symbol values and feature behaviour.

Bonus Features: Wilds, Multipliers, and Free Spins

Wild Symbols

The Joker symbol acts as a wild in Reel King. It can substitute for other symbols to help form winning combinations along active paylines. Wilds do not carry a multiplier of their own in this game.

Gamble Feature

After any win, you may be offered the chance to gamble it. The gamble is a straightforward 50/50 proposition: guess correctly and your win is doubled, guess incorrectly and you lose the entire win for that round. There is no way to guarantee a favourable outcome, and the feature is entirely optional.

Reel King Feature

The Reel King feature is the game's main bonus and can trigger at random between spins. When it does, you are taken to a separate mini slot with three reels. A Lucky Seven symbol is added to the symbol set, and the number and colour of the bonus icons that land determine your prize. This is not a free spins round in the conventional sense, and there is no way to trigger it manually.

Free Spins

Reel King does not have a traditional free spins feature. The Reel King bonus is the closest equivalent, but it plays out on a separate mini slot rather than awarding spins on the main reels. If you are looking for a game with a conventional free spins round, you will need to look elsewhere in the Reel King family or at other slots.

Other Reel King Features

Beyond the wilds, gamble and Reel King bonus, there are no additional features in the original game. There is no progressive jackpot, no scatter symbol and no bonus buy option. The paytable is built around standard line wins, with the Gold Coins symbol noted as having a high win value in the social app description.

The game's simplicity is deliberate. It is designed to be a quick, accessible slot that does not require players to learn complex mechanics. If you prefer a busier feature set, the wider Reel King family includes versions with different mechanics, but those are separate games and their details should not be applied to this one.

Where to Play Reel King

Reel King is a Greentube game, so you will find it at regulated online casinos that carry the Greentube portfolio. In Ireland, you should look for operators that hold a valid licence from the relevant authority and that publish clear terms on their website. The Gambling Regulatory Authority of Ireland is the body responsible for licensing and regulating gambling in the country, and its website is the best place to check the current framework.

Irish players should check the equivalent euro limits on whichever licensed operator they choose, as currency and operator settings can affect the displayed stake options. Always read the casino's terms and the game's in-game help before playing.

If you want to try the game without risking real money, some operators offer a demo mode. The separate Funstage social app is also available for iOS and Android, but it uses virtual Twists and cannot pay out real money. It is a different product from the real-money slot and should not be confused with it.

Other Slot Games You Might Enjoy

If you like the classic feel of Reel King, there are plenty of other slots worth exploring. For a similar fruit-machine style, try Book of Ra, another Novomatic classic with an Egyptian theme and a gamble feature. If you want a modern take on the classic format, Starburst offers simple mechanics with expanding wilds. For something with a more elaborate feature set, Gonzo's Quest uses cascading reels and multipliers. And if you want to compare the Reel King family more broadly, our full slot reviews section covers hundreds of titles across all major providers.