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Dio Killing the Dragon Slot Review

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Dio Killing the Dragon is a heavy-metal-themed online slot machine centring on the legendary Black Sabbath vocalist Ronnie James Dio. Made under license by Play’n Go in 2022, the game houses 4 reels, 3 rows, and 243 paylines with a 96.25% RTP. This non-progressive slot game also features sticky wilds, respins, scatter, free spins, multipliers, and mobile play. This game has a jackpot of 15,000x the bet and is available for playing on both desktop & mobile.



Few singers in the history of rock music have achieved the level of skill and respect of Ronnie James Dio, who is known for his work with Black Sabbath, Rainbow, and other legendary bands. Now, it seems Dio is coming to conquer the world of online slots. Named after the 2002 album, Killing the Dragon is a deep dive into the discography of Dio and the fantasy imagery he is famous for.

One of the latest licensed products by Play’n Go, the Dio Killing the Dragon slot game has a lot to offer beyond the singer’s name. It’s positively brimming with creative ideas and mechanics, so let’s get right into the review.

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First of all, don’t be confused by the strange layout of the reels. Although the reels on the left and right stand out, they are not really different. This is a fairly typical 4×3 slotwith 243 ways to win.

This means that there are no fixed paylines in Dio Killing the Dragon. Your goal is to arrange identical symbols on 3 or more connected reels. All winning combinations go from left to right, starting at the leftmost reel. Multiple winning combinations can be hit during the same spin.

Simply select the size of your stake using the buttons at the bottom of the screen. Hit Spin, and enjoy the show! Speaking of enjoying the show, Dio Killing the Dragon by Play’n Go has a sort of comic-book-like art style depicting dragons, monsters, and a fantasy landscape that will seem familiar to fans of Dio’s music. It’s one of the game’s best features in our opinion.

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Casino Bloke Best tips for Dio Killing the Dragon Slot

  • 1The Lock Up the Wolves feature moves the “cage” from left to right with each respin. Every time the re-spin is triggered, the cage moves by one reel. If a Wild lands on the new cage location, you get another free respin.
  • 2You can choose the current song by clicking on the Playlist button on the bottom left. This means that the game’s soundtrack can be customized to a degree, including three of the late singer’s famous songs.
  • 3Wilds can be the first symbol in a winning combination. In fact, they’re the highest-paying symbol in the game.


The first feature in Dio Killing the Dragon is called Lock Up the Wolves, which is another reference to Dio’s music. Essentially, if you land a Wild symbol on the leftmost reel, you get a free respin for which the Wild remains in its place. The golden Cage this feature uses then moves one reel to the right, where it can be triggered again for additional respins.

The Devil-like Bonus symbol acts as a Scatter, which means it can be triggered anywhere on the table. If you hit 3, 4, or 5 Scatters in a single spin, you win 6, 8, or 12 free spins, respectively.

Dio Killing the Dragon free spins make all the Wilds that land during them sticky. This only applies to reels 2, 3, and 4. However, it means the Free Spins bonus feature becomes exponentially more profitable with additional spins.

During the Free Spins, special symbols can land on the fifth reel. These extend the free spin round by 2 additional spins and award one of three special effects:


Play’n Go Dio Killing the Dragon offers 8 regular symbols. The classic card suits are all low-paying, but the Hearts and Diamonds are slightly better than Spades and Clubs.

The three so-called Monster symbols offer medium value. Last but not least, the sword-wielding Dio himself is the highest-paying regular symbol (though he is outvalued by the Wilds.)

Since the free spins in this game can theoretically go on forever, the payouts have a hard maximum limit. This limit is set at 15,000x your stake, no matter how you reach it.

It’s a fairly high maximum payout, all things considered. Obviously, the multitude of special features and symbol effects mean that this is a very volatile slot. The 96.25% RTP is solid, though it’s nothing to write home about either.

what we like

  • Fun theme, especially for Dio fans
  • Sticky Wilds feature that is active all the time, not just during free spins
  • Multiple special symbol effects and mechanics

what we don’t like

  • Mediocre RTP


If you happen to be a fan of both online slot games and Ronnie James Dio, look no further for your favourite new game.

First of all, the theme does the heavy metal legend justice. The imagery is all one big callback to the decades of work the man left behind, and it’s quite lovingly crafted. Of course, the fact that you can enjoy Dio hits while playing is just the cherry on top.

However, what we really found interesting is that Play’n Go does not completely rely on the license to carry this game. It still has fun, interesting features that make it play like more than a cheap cash-grab.

A superb release and a must-play for any casino-loving heavy metal fan.

Dio Killing the Dragon Slot total score:

Total Score Overall

Game developed by:

Release year:2022

Available on:Desktop, Mobile

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