Microgaming’s King of the Ring Slot Review

The King of the Ring online slot is powered by Microgaming and has 5 reels and 9 paylines. Available to play from 9p to £45 per spin across all devices, this Muay Thai inspired slot benefits from high value symbols and a Free Spins feature where you can win up to 30 free spins with all wins trebled (3x multiplier).

Where to Play Microgaming’s King of the Ring Slot


up to £50


Free Spins



T&C Apply

18+ new players only. Maximum £50 bonus. Minimum deposit: £20. Max bet with active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Winnings from Free Spins come as cash. Some games may not be played with an active bonus. Games may contribute differently when wagering a bonus. www.begambleaware.org.#ad


up to £100


Free Spins



T&C Apply

T&Cs:  18+. Full T&C’s Apply. New players Only. £10 min deposit. £5 max bet using bonus. 40 x wagering applies. Bonus valid for 14 days. 30 Spins on pre-selected games will be credited instantly + then 30 per day for 9 days. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. E-Wallets excluded. Always refer to Bonus Terms – www.begambleaware.org #ad


up to £150





T&C Apply

First Deposit Only. Min. deposit: £20, max. Bonus £150. Game: Starburst, Spin Value: £0.10. WR of 60x Bonus amount and Free Spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.30) of the free spin winnings and bonus amount or £5 (lowest amount applies). Free Spins must be used before deposited funds. First Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos. Bonus Policy applies. #ad

King of the King Theme/Symbols

With a Muay Thai theme, King of the Ring tells the story on an intense combat between 2 Muay Thai fighters. With an Asian feel, symbols include A, K, Q, J, 10 and 9 royals as well as champion belts, mongkhon headbands, boxing gloves and the 2 Muay Thai fighters. The latter 2 pay 83.33 times your stake for 5 in combination.

There’s also another Muay Thai fighter symbol which is the wild and substitutes for all symbols bar the scatter – 2, 3, 4 or 5 on a payline will result in a 1.11, 22.22, 222.22 or 1,111.11 times stake win. You form winnings by getting matching symbols on adjacent reels starting from reel 1.

Free Spins feature

The King of the Ring slot comes with a solitary bonus feature – the Free Spins feature. This is played when you get 3 or more fighter scatters anywhere on the reels – you’ll get 2, 5, 20 or 500 times your stake for 2, 3, 4 or 5 on the reels. 3 or more will give you 15 free spins. With all wins subject to a trebling (3x) multiplier, you can retrigger the feature and win yourself another 15 free spins – taking your total to 30.

King of the Ring verdict

King of the Ring is rather basic in terms of gameplay as it just comes with 1 bonus feature found in countless other online slots. However, the Free Spins feature is a good one due to the high value symbols and the 3x multiplier. Filling the reels with Muay Thai fighter wilds will result in a 10,000 times stake payout – if you add in the 3x multiplier, you could potentially win 30,000 times your stake on every free spin! It is highly volatile though.

The King of the Ring mechanic may seem familiar – that’s because it uses the same game engine used in Microgaming’s iconic Thunderstruck slot. Not a bad slot to base yourself on! If you like the fighter theme though, Playtech’s Eliminators is recommended.

King of the Ring Slot Information

  • Game:
    King of the Ring
  • Software:
  • Type:
    Video Slot
  • Reels:
  • Paylines:
  • Total Coins:
  • Coins Range:
    0.09 to 45.00
  • Jackpot:
  • Bonus Round:
    Yes (1)
  • Free Spins/Multiplier:
Review by Chris Taylor

Review by Chris Taylor

Chris is a slots expert that has reviewed and played over 4,000 online slots. Having being in the iGaming industry for over 16 years, he knows how slots work, how bonus features are triggered and how the RTP and variance affect the gameplay.