King of Slots Slot Casinos: Top Picks to Play Online in the UK
Written by James Gibson
King of Slots is an online slot game developed by NetEnt and released in March 2015. It has medium volatility and a rather high RTP of 96.96%. The special features are respins that kick in after every win and a free spins round.
NetEnt is a well-established supplier of online casino games that’s been in the business for a long time. As such, there are many leading UK casino sites where you can play NetEnt games. We’ve listed some of the best options right here on this page for you.
Best King of Slots Casino Sites for 2026
| Position | Casino test reports | Rating | Bonus | Special features | Payout rate | Payout duration | Casino Games | To the provider | General terms and conditions |
|---|---|---|---|---|---|---|---|---|---|
 | |||||||||
| 1 | BetMGM | 5.0/5 | Enjoy 200 Free Spins When You Play £10 |
Visa, Mastercard, PayPal , Bank Transfer
Push Gaming, Relax Gaming, Hacksaw Gaming, Nolimit City, Playtech, Synot, Play'n GO, Games Global, NetEnt, Pragmatic Play, ELK Studios, Blue Guru Games, Peter & Sons, Alchemy, Evolution, Yggdrasil, Blueprint Gaming, Red Tiger Gaming, Inspired Gaming, Iron Dog Studio, Switch Studios, Northern Lights Gaming, Fantasma, Merkur, Big Time Gaming, Thunderkick, Quickspin, Slingo Originals, Novomatic, 1x2gaming, 4theplayer, Atomic Slot Lab, AvatarUX Studios, Bang Bang Games, , Bragg Gaming, Crucible Gaming, Eyecon, Four Leaf Gaming, Foxium, Gaming Corps, HungryBear, iSoftBet, Jelly, Just For The Win, Lightning Box, Octoplay, Playson, Playzido, Print Studios, RAW iGaming, Realistic Games, Red Rake Gaming, ReelPlay, S Gaming, Silverback, Snowborn Games, Spribe, Stakelogic, Storm Gaming, Wazdan, Williams Interactive |
97.89% | Up to 48 Hours | 3000+ | Claim Your Bonus! | T&Cs Apply New customers only. Opt-in required. Time to deposit/wager 7 days. Deposit £10 & wager 1x on casino games (wagering contributions vary) for 200 Free Spins worth 10p each on Big Bass Splash. 3 day reward expiry. 18+. Please gamble responsibly. BeGambleAware.org |
| 2 | Duelz | 4.9/5 | Up to 140 Free Spins When You Deposit £25 |
Trustly, PayByMobile, Bank Transfer, Visa, Mastercard, PaysafeCard, Skrill, Neteller, Payz, PayPal
Play'n GO, NetEnt, Evolution Gaming, Pragmatic Play, Games Global, Scientific Games, Big Time Gaming, Blueprint Gaming, Red Tiger, Relax Gaming, Push Gaming, ELK Studios, GAMOMAT, Quickspin, Yggdrasil |
95.14% | 2 - 4 days | 2009 | Claim Your Bonus! | Full T&Cs apply. 18+. New players. Min deposit £25. Up to 140 Free Spins (20/day for 7 consecutive days on selected games). Manually claimed daily or expire at midnight with no rollover. Free spin value £0.10. Max winnings £100/day as bonus funds with 10x wagering requirement to be completed within 7 days. Game restrictions apply. Play Responsibly! GambleAware. |
| 3 | Grosvenor | 4.8/5 | Deposit £20 and Get £40 Bonus + 100 Free Spins |
Visa, Mastercard, PayPal, PaysafeCard
NetEnt, Pragmatic Play, Play’n GO, NYX, IGT, WMS, Novomatic, , Playtech, Realistic Games |
97.15% | 1 - 3 days | 1675+ | Claim Your Bonus! | Full T&Cs Apply. +18. New players. Min Dep £20 (Excl. PayPal & PaySafe). Max Bonus £40 on selected games & 100 Free Spins on Big Bass Splash. Wagering & max win apply. GambleAware.org Play Responsibly. |
| 4 | Fitzdares | 4.8/5 | Coming Soon |
Visa, Mastercard, Maestro, Apple Pay, Bank Transfer
NetEnt, Blueprint Gaming, Microgaming, Evolution Gaming, Pragmatic Play, Realistic, Just For The Win, Inspired, Link2 Win, Skywind Group, Light & Wonder |
96.00% | 1 - 7 days | 2000+ | Claim Your Bonus! | Full T&Cs apply. 18+ Full T&Cs apply. Gamble responsibly. GambleAware.org |
| 5 | Fun Casino | 4.7/5 | Deposit and wager £10 for 100 Cash Spins |
Visa, Mastercard, PayPal, Trustly, Skrill, Neteller
Amatic, Blueprint, Evolution, IGT, Microgaming, Novomatic, NextGen, Play'n GO, Pragmatic Play, Relax Gaming, Stakelogic, Eyecon, Thunderkick, Big Time Gaming, Inspired, Hacksaw Gaming, NetEnt, Red Tiger, Slingo, ELK Studios, Nolimit City |
96.00% | 1 - 2 days | 2673+ | Claim Your Bonus! | New players only | Deposit & wager at least £10 to get free spins | Free Spins winnings are cash | No max cash out | Eligibility is restricted for suspected abuse | Skrill deposits excluded | Free Spins value £0.10 per spin | Free Spins expire in 48 hours | 18+ Full T&Cs Apply. GambleAware.org Play Responsibly |
This review looks at King of Slots in detail. It lets you know the slot’s key facts and stats, while also giving an overview of how its gameplay works and what its special features are. Keep reading if you’re intrigued and want to learn more.
Overview of the King of Slots Slot Game
King of Slots in Brief:
- Release Date: 30 March 2015
- Type: Video Slot
- Theme: Classic
- Software Studio: NetEnt
- RTP: 96.96%
- Hit Frequency: 25%
- Volatility: Medium
- Special Features: Sticky Win
- Bonus Rounds: Free Spins
- How to Trigger Bonus Round: Land a Winning Combination for Sticky Win or Land 5 or More Scatters for Free Spins
King of Slots uses a standard 5×3 grid and all of the positions are set within a gold frame. The King of Slots himself stands at the bottom right corner of the screen and watches as the action takes place.
The background image shows theatre curtains and a purple glow surrounds the gaming grid. The slot looks different from other classic games and is quite well designed overall. Thankfully, it has a good number of features to offer.
More About Online Slots
Full Rules & Information About the King of Slots Online Slot
King of Slots uses a standard 5×3 grid and has 25 paylines that you can create winning combinations on. These run from left to right and work in the usual way.
King of Slots Factsheet
| Reels | 5 |
| Rows | 3 |
| Paylines | 25 |
| Multipliers | Yes |
| Gamble Feature | No |
| Free Spins | Yes |
| Bonus Games | No |
| Jackpot | No |
| Min Bet | £0.25 |
| Max Bet | £5.00 |
To win, at least three instances of the same symbol need to land adjacently on a payline from left to right. The slot’s volatility is medium, which is a balance between the low and high volatility settings.
As you play King of Slots, you should get some small, frequent payouts and the occasional larger win. There are multiple bet sizes you can choose from. Each one covers all 25 of the slot’s paylines.
King of Slots Symbols & Payouts
You’ll see nine regular paying symbols as you play King of Slots. The five low-paying ones are 10, J, Q, K and A. Offering bigger payouts are a pair of cherries, a lemon slice, a watermelon slice and a crown.
The most rewarding of these is the crown. Fill a payline with five crowns and you’ll be paid 40x your bet. The slot’s two special symbols are the wild, which fills in for all regular symbols, and the scatter.
- All symbols: 11
- Highest-Paying Symbol: Crown
- Wilds: Yes, regular
- Paylines Pay: Left to right
- Maximum Win: 700x
King of Slots Bonuses & Features
Whenever you win, the Sticky Win feature comes into play. All reels with winning symbols are held in place. All reels without winning symbols respin, giving you the chance to increase your payout.
If this produces any new winning symbols, you get another respin. When a respin takes place but there are no new winning symbols, the feature ends and you get paid.
Land five, six, seven, eight or nine-15 scatters to earn 10, 15, 20, 25 or 30 free spins respectively. While the free spins round is in play, a 3x multiplier is applied to all payouts.
Similar Games & Best Alternatives
After playing King of Slots, why not try some other NetEnt titles? Twin Spin is a great one to start with. There’s also Starburst, Neon Staxx, Finn and the Dragon Tales, Gonzo’s Quest and Reel Rush.
Many other providers have created slots similar to King of Slots that you might be interested in. Check out Reel King Mega from Red Tiger, 4 Wild Riches from Iron Dog and Joker’s Jewels from Pragmatic Play.
Trigger Respins and Free Spins with King of Slots
King of Slots looks appealing and is fun to play thanks to its special features. Spin the reels and each time you win, respins give you the chance to extend your win.
If you get to play the free spins round, you’ll benefit from a 3x multiplier. Give King of Slots a try at one of the NetEnt casino sites we’ve suggested. You’re sure to enjoy playing this classic slot.