Champion of the Underworld

Champion of the Underworld Slot Logo No Deposit Slots

Champion of the Underworld is a Greek mythology-inspired slot from Yggdrasil with a 6 x 4 grid layout.

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Champion of the Underworld Game Overview

This real money slots game has up to 4,096 potential winning paylines. The maximum possible payout is 10,000x your bet. Meanwhile, it is a medium volatility slot making the potential prize even more impressive. 

Stakes range from £0.20 up to £4.00 per spin when you play this slot game at No Deposit Slots online casino. To select your preferred stake, tap on the coin stack at the bottom right of the screen. After which, you can start playing by pressing the spin button.


The main feature of this game is the Gigablox. After each spin, highlighted Gigablox show up. Any symbol can appear as a Gigablox landing as a 2x2 or 4x4-sized symbol. 

However, the Gigablox symbol is usually counted as multiple 1x1 size symbols if it occurs in a win.

Paying Symbols and Potential Wins

Players must land at least three matching symbols on adjacent reels going from left to right to form winning combinations. 

There are eight paying symbols in this game. They include card suits (diamonds, hearts, spades, and clubs) and four monster symbols. All the card symbols can award you up to 0.5x your wager if you land six matching ones on adjacent reels.

The horse and blue-monstrous symbols can payout 0.2x - 1x your stake, while the purple monster is worth 0.25 - 1.5x if you land three to six matching symbols. The highest-paying monster symbol is the red bull-looking monster. It can reward you up to 2x your wager for a six-of-a-kind combination. 

Wild Fight

The wild fight feature may activate at random times in the base game. When this happens, Hades will move to fight any monster symbol on the playing grid, even Gigablox symbols. If Hades is victorious, the conquered monster will change to a wild.

Free Spins Feature

Landing five or more scatters will trigger the Free Spins Bonus round. The number of scatters in view determines the number of Free Spins you get. For instance, five scatter symbols will award you five Free Spins, six scatters equal six Free Spins, and on it goes. 

Note that the scatter could also come as a Gigablox, and the number of Free Spins is calculated per 1x1-sized symbol. Meaning that a 2x2 reel Gigablox will award you four Free Spins.

Unlike in the base game, wild fights occur in every spin during the bonus game. Meanwhile, the bonus game comes with a potential win multiplier. Anytime a victory happens - when monster symbols transform into wild symbols, the multiplier counter increases by one.

You attain the first level when you get up to nine transformed wilds. That will award you an x2 multiplier. 11 more transformed symbols will take you to the next level, which earns you an x3 multiplier. It continues this way until the final milestone - 17 transformed wilds, which give a whopping x25 multiplier. In addition, each milestone awards you an extra two Free Spins.


During the bonus game, you can utilize your Free Spins or gamble for more. This feature allows you to gamble for up to 20 more Free Spins. You do this by picking one sword from an arsenal of swords. However, you only get to know the kind of sword it is after you have chosen one.

Whichever sword you get determines your fate. You can rejoice if you pick a golden sword as it awards additional spins. But if you happen to choose a broken sword, you lose. In this case, you lose the right to the initial Free Spins and the entire bonus round.

Champion of the Underworld RTP

Return To Player (RTP): 96%

The RTP is a theoretical value and is shown as a percentage. It’s used to describe the percentage of money wagered a particular casino game may pay back to players over a certain period of time.

For example, if a game had a RTP of 92%, in theory, this would mean that for every £100 wagered, the game could return £92 back to players in potential winnings. However, it is important to note that winnings are completely random, and players are not guaranteed to receive this.

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*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.