Champion of the Underworld Slot Review

3.7/5
Based on our expert’s review. Reviewed by
Yggdrasil Gaming Slot Reviews
Review by
Martin Backhouse
Updated: 28/09/2022
Review by
Martin Backhouse
Updated: 28/09/2022

Are you brave enough to return to the depths of the earth and take your chance to spin the reels for potential riches? This Champions of the Underwodl slot from Yggdrasil Gaming is the next instalment from the ‘Underworld’ series of games. In the provider’s own words, as you spin the underground arena machine and obtain high-paid symbols, some will transform into Wilds, increasing your victories. The Gigablox mechanic will make the payout even more spectacular, and the featured Free Spins feature will be further intensified by every Wild symbol, even those awarded by Wild Fight. All of these can lead to max wins of 10,000 x your stake, but how does it compare to others on the market? Find out below in our full and unbiased Champions of the Underground review.

Max Win
10,000 x bet
Play
T&Cs Apply

18+. BeGambleAware.org. New Customers Only. Minimum deposit £10. 50x wagering requirement apply. Bonus will expire 30 days after opt-in. Further T&Cs apply. #ad

Provider
Yggdrasil Gaming
Type of Slot
Video Slot
Theme
Fantasy
Reels
6
Paylines
4,096
Stakes Range
20p to £100
Bonus Features
Yes (5)
Free Spins/Multiplier
5-Unlimited/1-25x
Max Win
10,000 x
RTP
96%
Volatility
Super High

Champion of the Underworld Demo

18plus uk-gambling-commission online-slot-co-uk-logo agechecked-verification-provider
T&Cs Apply 18+. BeGambleAware.org. New Customers Only. Minimum deposit £10. 50x wagering requirement apply. Bonus will expire 30 days after opt-in. Further T&Cs apply. #ad
18plus uk-gambling-commission online-slot-co-uk-logo agechecked-verification-provider
T&Cs Apply 18+. BeGambleAware.org. New Customers Only. Minimum deposit £10. 50x wagering requirement apply. Bonus will expire 30 days after opt-in. Further T&Cs apply. #ad

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Champion of the Underworld Slot RTP, Details & Wager Limits

Reels/Paylines: 6 + 4,096 paylines

Stakes Range: 20p to £100 per spin

RTP: 96%

Max Win: 10,000 x bet per spin

The Champion of the Underworld slot is played on 6 reels, 4 rows, and has 4,096 paylines. Winners are formed by landing 3 or more matching symbols from left to right, starting from reel 1.

Stakes range from 20p up to £100 per spin, which is a typical range for Yggdrasil slots. Catering to all bankrolls, you can easily adjust your total bet by hitting the coin icon below the reels. You have 17 separate bet values to choose from.

The Champion of the Underworld RTP is 96%, which is bang on the average for an online slot. It comes with super high volatility and a hit frequency of 25.76%. This means that just over a quarter of all spins on average will land a winning combination.

The maximum win is 10,000 x your stake. This isn’t the highest by any means but it’s certainly not the lowest around. The Free Spins feature will present your best chance of landing the top prize due to the multipliers that come into play. More on that further down.

Theme – a colourful underworld battle

Theme: Fantasy

High Value Symbol: Red Bull

Compatibility: Mobile, Tablet, Desktop

champion-of-the-underworld-slot-base-game

The theme in the Champion of the Underworld slot is all about the underworld and the fantasy creatures fighting in the supernatural world of the dead. The game follows on from Hades: Gigablox, but the overall theme here is not as menacing in comparison.

The reels are set in an underworld arena, which looks rather gladiatorial. This accompanies a tense and suspenseful soundtrack, which gives it an eerie feel. Dark rock music then comes into play as you spin the reels to add to the intensity. It all works very well together.

On the reels, the card suits of clubs, diamonds, spades and hearts make up the lower-paying symbols. The higher-paying ones consist of a horse, a four-eyed lady, a medusa-like character and a bull. The red bull is the most rewarding symbol, paying 0.25, 0.5, 1 or 2 x your stake for 3, 4, 5 or 6 in combination.

The game’s Wild is a golden skull, which substitutes for all regular symbols. Here’s a helpful table listing the symbols you’ll come across in the game:

Symbol Payouts/Info
champion-of-the-underworld-slot-club-symbolClub 3, 4, 5 or 6 = 0.1, 0.15, 0.25 or 0.5 x stake
champion-of-the-underworld-slot-diamond-symbolDiamond 3, 4, 5 or 6 = 0.1, 0.15, 0.25 or 0.5 x stake
champion-of-the-underworld-slot-spade-symbolSpade 3, 4, 5 or 6 = 0.1, 0.15, 0.25 or 0.5 x stake
champion-of-the-underworld-slot-heart-symbolHeart 3, 4, 5 or 6 = 0.1, 0.15, 0.25 or 0.5 x stake
champion-of-the-underworld-slot-green-horse-symbolGreen Horse 3, 4, 5 or 6 = 0.2, 0.3, 0.5 or 1 x stake
champion-of-the-underworld-slot-blue-4-eyed-lady-symbolBlue Four Eyed Lady 3, 4, 5 or 6 = 0.2, 0.3, 0.5 or 1 x stake
champion-of-the-underworld-slot-pink-medusa-symbolPink Medusa 3, 4, 5 or 6 = 0.25, 0.4, 0.75 or 1.5 x stake
champion-of-the-underworld-slot-red-bull-symbolRed Bull 3, 4, 5 or 6 = 0.25, 0.5, 1 or 2 x stake
champion-of-the-underworld-slot-wild-symbolWild Substitutes for all regular symbols
champion-of-the-underworld-slot-scatter-symbolScatter 5+ triggers Free Spins feature

Champion of the Underworld Mobile

champion-of-the-underworld-mobile-slot

The Champion of the Underworld mobile slot game has been produced using the latest HTML5 technology. It’s compatible with landscape and portrait on all smartphone devices. The 6×4 setup plays very well on smaller screens.

Champion of the Underworld Bonus Features

There are 5 bonus features here, but just 1 main one is at the forefront of the action. That is the Free Spins feature, which comes with Multipliers and the chance to gamble for even more free spins in some territories. Let’s run you through everything about it.

Gigablox feature

This feature involves oversized symbols on the reels that act like normal symbols but in a 2×2 to 4×4 formation. Free Spins Scatters can also land as Gigablox in this game.

Wild Fight feature

On any spin in the base game, Hades can fight all high symbols to convert them into Wilds if he wins. There is also the chance to convert Gigablozx symbols into Wilds.

During the Free Spins feature, Hades fights on every spin, and each symbol that turns Wild will increase the Multiplier counter.

Free Spins feature

champion-of-the-underworld-slot-free-spins-feature

Land 5 or more Scatters in the base game to trigger the Free Spins feature with at least 5 spins. Each Free Spin Scatter that lands during the bonus round will give you 1 extra free spin.

As mentioned above, this bonus round comes with a multiplier counter, which is increased by 1 every time Hades wins a fight. The more you turn into Wilds, the bigger the multiplier, as shown in this table:

Total Symbols Turned Wild Award
First 9 2x multiplier plus 2 extra free spins
Next 11 3x multiplier plus 2 extra free spins
Next 13 5x multiplier plus 2 extra free spins
Next 15 10x multiplier plus 2 extra free spins
Next 17 25x multiplier plus 2 extra free spins

25x is the maximum multiplier possible

Any Gigablox that is converted into Wilds is counted by their size. So for example, a 2×2 Gigablox Wild will count as 4 Wilds towards the overall counter.

Gamble & Buy Bonus feature

When triggering the Free Spins feature, you can gamble for more free spins unless you’ve already got a maximum of 20 initially. Simply choose a sword and you will win if it’s got a golden tip.

Players in most territories outside the UK can also buy the Free Spins feature. 90x your stake will get you 5 free spins, whereas 1,000x your stake will get you 20 free spins.

Champion of the Underworld Review Summary – unleash the power of Gigablox and Wild Fight

Ratings
Theme & Symbols








Sounds & Music








Bonus Features








RTP (96%)








Max Win (10,000 x)








Originality








Champion of the Underworld combines the powers of Gigablox and Wild Fight for a fantastic experience. It’s all about transforming those symbols into Wilds for bigger wins, and it happens pretty frequently which is great to see. During testing, although super high in volatility, I landed some nice wins.

If you’re in the UK, you won’t have the option to gamble or buy any features, but that’s ok as the gameplay is enjoyable as you spin away hoping to land the Free Spins feature. The visuals are solid and the soundtrack works really well, which is not something you can say about every slot on the market today.

Overall, it’s a great release from Yggdrasil and it will suit players who enjoy the Gigablox mechanic. Let’s not forget that it has 25x multipliers in the Free Spins feature too for potentially even bigger wins up to 10,000 x your stake.

Perhaps the best Gigablox game of them all that you must try is 90K Yeti Gigablox from 4ThePlayer. There are plenty of bonus features here, 46,656 ways to win and 90,000 x max wins up for grabs.

Pros
  • 10,000 x bet max wins
  • Exciting Wild Fight feature
  • 4,096 paylines
Cons
  • Super high volatility

Champion of the Underworld FAQs

What is the Champion of the Underworld RTP?

The Champion of the Underworld return to player rate is 96%. Highly volatile, the hit frequency is 25.76%, which means that just over a quarter of all spins will be a winner.

What is the Champion of the Underworld max win?

The maximum win is 10,000 x your stake. This is best achieved in the Free Spins feature due to the multiplier that can reach 25x.

Are there any Champion of the Underworld free spins?

Yes. Land 5 or more Scatters to trigger the Free Spins feature. There are multipliers here and each level increase will add 2 extra free spins. We explain how it all works in our review.

Is there a Champion of the Underworld demo?

Yes, the Champion of the Underworld demo is available here at Online-Slot.co.uk. Return to the depths of Earth on mobile, laptop, PC and tablet devices.

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