Knockout Diamonds

Knockout Diamonds

Blast the sound system and have a pre-match warm-up session before you step into the boxing ring. You’ll need a lot of energy to rumble and even more stamina to last at least one free spins round. A cross between some classic slot mechanics and a video slot bonus features, this mighty slot machine is more than just a fruity little game.
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What does John have to say?

A hybrid of old and new, this is an excellent addition to the developer’s ELK Classic Series that fans of classic slots will enjoy any day.

Leanna Madden


Leanna Madden

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  • Thumbs-Up Multiplier wilds can randomly boost wins up to 3x
  • Thumbs-Up 3 scatters on a payline trigger the max win
  • Thumbs-Up Scatters payouts occur during the free spins round
  • Thumbs-Down Max potential might not resonate that well

Knockout Diamonds Review

If there’s anyone that can merge old and new in an effortless fashion, it’s the clever guys at ELK Studios. They even managed to turn a basic 1-reel fruit slot into a boxing ring, which is the main theme of the game. Knockout Diamonds is the 8th addition to their ELK Classic Series portfolio, and it looks fantastic. The game’s well-crafted mix of classic and video slot features works a treat here and pulls you right into the middle of a boxing ring.

Whether you love simple 3-reel slots or not, you’ll want to give this one a go. Better yet, come and read our slot review to find out all about the game’s original and super fun bonus rounds.

SLOT FEATURES Free Spins, Respins, Multiplier Wilds
RELEASE DATE 5 January 2021
SLOT TYPE Video Slot
REELS, ROWS, PAYLINES 3 Reels, 0 Rows, 1 Payline
BET LEVELS £0.25 – £100
MAXIMUM WIN 2,500x Your Stake

Knockout Diamonds slot screenshot of the reels

Knockout Diamonds Bonus Features

Elk Studios nailed it again. The sounds and special effects in this game make it feel as if you’re part of a boxing match. The two unique bonus features, the Knockout Spins and the Ringside Rumble, have a powerful effect on your gameplay while multiplier wilds can also boost your wins occasionally.


The game is equipped with regular wilds and multiplier wilds that replace all symbols on the grid except the bonus symbols. The multiplier wilds will also boost your wins occasionally by 2x or 3x.


In Knockout Diamonds, the slot’s forename represents scatter symbols. Hitting 3 of them on the payline will initiate the Knockout free spin bonus round. These bonus symbols will come in handy when trying to restart the bonus round, but the best rewards from these premium symbols will come during the Knockout bonus game.

Free Spins

Termed Knockout Spins, the free spins bonus round starts with 3 free spins. It might seem like there isn’t much going on during this bonus round at first, but there is.

You might not catch it at the start, but as you spin, you collect bonus symbols throughout the round. The bonus symbols are then evaluated at the end of the round, and if you manage to collect 10 of them, you win the game’s max payout, which is 2,500x your bet. The other way you can obtain the max win is when you hit 3 Knockout scatters on a payline during the bonus round. And there’s more.

Landing any more scatters or triggering a winning combo during the free spins round will reset whatever free spins you’ve got left back to the 3 initial spins to keep the bonus round going.


Elk Studios must have had lots of fun naming the bonus features. Known as respins initially, they are called Ringside Rumble in Knockout Diamonds. This feature comes into motion when 2 identical symbols land on reels 1 and 2. Following activation, the two reels will lock while the 3rd reel respins 3 times, allowing you to improve your winning combination and hit some much-needed wins.

Knockout Diamonds Jackpot

There is no jackpot in Knockout Diamonds and the max win of 2,500x your stake isn’t massive either. But then again, the game only has 3 reels and 1 payline.

RTP and Volatility

Even though it’s a simple game, don’t take the classic reel-set up for granted, the volatility is pretty high here. Whereas, the RTP stands at a basic 96%, which is considered to be the industry average for online slots these days.

Where to Play Knockout Diamonds

Fancy stepping into the boxing ring? Then be sure to choose the right casino for the fight. Our casino experts recommend NextCasino and Unibet for a fair match.

Knockout Diamonds on Mobile

Play Knockout Diamonds from any location via the mobile version of the game as long as your internet connection is decent and secure. If you are using an Android or iOS device, you shouldn’t run into any issues. ELK Studios made sure it’s instantly adaptable to any small screen, be it a mobile or a tablet.