Champion of the Underworld

Slot Review
September 27, 2022

Champion of the Underworld Slot Overview

Champion of the Underworld is a new casino slot from Yggdrasil, taking action to new levels. Players will be accompanied by disted guitars in the underworld of the Greek god of death, Hades. He resides in the darkest of places, in an arena full of dead souls. This dark story has very high volatility and Gigablox symbols that can cover up to 4X4 formations on the screen. Hades can fight the other high-paying symbols at any spin, turning them into wilds whenever he wins. Just entering the ports to the underworld is a risky move, and the really adventurous player can gamble his free spins for a chance to land the maximum amount of 20 spins. Welcome deep down to the underworld.

Base game

Champion of the Underworld is a video slot from Yggdrasil containing 6 reels, 4 rows, and 4096 ways to win. The is 0.2, and the is 100. The RTP is stated as 96.00%, but Yggdrasil is also releasing versions with RTP of 94%, 90.5%, and 86%. The volatility is very high, or super high, as the developer expresses it. The most fortunate player can land the max win of 10000X the bet.

Deep down in the underworld of Hades await several helpful tools. Make sure to look out for the features Wild Symbol, Gigablox, Scatter Symbol, Wild Fight, Free Spins Gamble, Free Spins, and Bonus Buy.

Champion of the Underworld Slot Information

Casino slots are sometimes a little too cute like they would have been designed for children. That is not the case in Champion of the Underworld, though. We have ended up in an open stadium where the roof’s on fire, and blue and green souls are sitting in the stands. A fire is burning on each side of the reels, and a mysterious drumming sound enhances the spooky feeling. Once you start spinning the reels, the music changes into heavy metal with dark guitars. To make a win, you need to land at least 3 of the same symbols on adjacent reels, starting with the first reel to the left. The game is, of course, available on all devices, such as mobile phones, notepads, and desktop computers.

The lower-paying symbols are the suits from a deck of playing cards. Landing clubs, diamonds, spades, or hearts will award 0.5X the bet for a combination of 6 symbols. The higher-paying symbols are all scary-looking monsters. We have a green horse, a blue-skinned and blue-haired woman, a purple woman with snakes as hair (could it be Medusa?), and an ox-looking creature with a ring in his nose. Landing these symbols awards between 1X and 2X the bet for a combination of 6 symbols. The Wild Symbol substitutes all symbols except the Scatter.  

Champion of the Underworld Slot Features

What is the max win in the slot Champion of the Underworld?

You can win up to 10000X the bet.

What features are available in the slot Champion of the Underworld?

The features are Wild Symbol, Gigablox, Scatter Symbol, Wild Fight, Free Spins Gamble, Free Spins, and Bonus Buy.

Mega Big Win

Wild Symbol

The Wild Symbol, depicted by a grinning death skull, substitutes all symbols except the Scatter.


Any symbol can appear as a Gigablox, in the shape of 2X2, 3X3, or 4X4. Whenever a Gigablox lands, it’s divided into normal-sized symbols before the payout. Hence, a 4X4 Gigablox equals 16 symbols. 

Scatter Symbol

The Scatter Symbol says “free spins” in block letters. You need to land at least 5 to trigger the free spins, and you’ll be awarded one spin per symbol. The symbols are calculated on symbol size; hence a 2X2 Gigablox scatter equals 4 scatter symbols. Every scatter landing in the free spins awards an extra spin.

Free Spins

Wild Fight

On any spin in the base game, Hades can decide to fight the monsters. Every monster that is defeated will turn into a wild symbol. This also applies to Gigablox symbols.

Free Spins Gamble

You can try to add a couple of extra spins before you enter the feature, as long as you don’t already have the maximum number of spins (20). You can gamble for a lower amount of spins with a higher chance of success or more spins with a lower chance of success. You’re presented with a mini-game where you should draw a sword. Picking a sword with a golden tip will give you one or several extra spins, while picking a broken sword will make you lose all your spins, taking you back to the base game.

Free Spins

The Free Spins are extra brutal, with Hades giving a wild fight on every spin. The feature also has a multiplier counter starting at 1X and increasing when Hades turns monsters into wilds. This is how many successful fights Hades has to do for the multiplier to increase:

9 Fights = 2X multiplier

20 Fights = 3X multiplier

33 Fights = 5X multiplier

48 Fights = 10X multiplier

65 Fights = 25X multiplier

The player is awarded 2 extra spins every time the multiplier is upgraded. The 25X multiplier is the highest you can reach, and the fight counter will stop counting the wins.

Free Spins Gamble

Bonus Buy

The Bonus Buy will let the player purchase the free spins. Paying 90X the bet will trigger the feature with 5 spins. Paying a hefty 1000X the bet will give you the feature with 20 spins. If you purchase the 5 free spins, you have the option to gamble for more. Just remember that you can lose them all.

Champion of the Underworld Slot Conclusion

Yggdrasil gives us a dark and scary story with Champion of the Underworld. The music is entailing and helps make the scene even more unwelcoming, and the graphics with the scary-looking monsters are perfect. It delivers the same feeling as the developer’s apocalyptic Florageddon!, where carnivorous plants have wiped out almost all human civilization. Yggdrasil has also created cuter stories of the underworld, like Lilith’s Inferno.

We appreciate that the Gigablox has been thrown into Hades’ underworld. However, no Gigablox can cover the complete grid since there are more reels than rows. It would have been awesome if there was a chance to land a 6X6 Gigablox symbol. The Wild Fight is a cool little feature that can pop up randomly in the base game and happens on every free spin. We could have wished for some graphics showing the fight, though. If you haven’t read the rules, it might even be hard to know what is happening.

The free spins are very exciting, but we’re once again not super happy with the fights. It might be that we were unlucky, but it was very rare that Hades actually won a fight and turned a monster into a wild symbol. The free spins gamble is another exciting feature, only for the really risk-willing player. The game’s RTP is stated as precisely 96%, which is about the standard or just under. The max win of 10000X the bet is pretty good, although we could have wished for a little more considering the game’s description as having super high volatility.

Champion of the Underworld from Yggdrasil is a dark story in Hades’ kingdom with Gigablox symbols and free spins with a progressive multiplier.

Quick information
  • Title: Champion of the Underworld
  • Developer: Yggdrasil
  • Reels: 6
  • Rows: 4
  • Paylines: 4096
  • RTP: 96%
  • Hit Frequency: 25.76%
  • Max Win: 10000x
  • Volatility: High
  • Min/Max Bet: €0.2/€100
  • Release Date: Oct 06, 2022
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