Yggdrasil Gaming

Champion of the Underworld

RARE Slots Video Slots 3D Slots Fantasy Mythology Fruit Underworld Animals Monsters Battle

An Underworld-series arena contest led by Hades

Only 0.2% of slots feature Gigablox.

SlotRanker Score

/ 99

05099

The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals, and it cannot be bought.

How this score is built

RTP

94%

return to player

Volatility

High volatility

variance

Max win

10,000×

top multiplier

Min bet

$0.20

per spin

Reels

4096 lines

Player rating

4.5 ★

17 votes

DEMO Play free, no signup

Yggdrasil Gaming

Embed on your site

4.5 / 5

17 ratings

User ratings are shown separately from the Slot Score unless stated otherwise.

Five weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.

Payouts & RTP6/10

RTP 94% → 6.0/10

Volatility9/10

high → 9.0/10

Win Potential8/10

x10000.00 (10000×) → 8.0/10

Features10/10

17 features → 10.0/10

Game Mechanics7.4/10

f=17 r=6 p=4096 → 7.4/10

Context signals (tie-breakers)

Layout5/10

6x4 → 5.0/10

Bet Flexibility6/10

0.2–100 (×500) → 6.0/10

Provider Reputation6.9/10

provider avg 6.9 → 6.9/10

Popularity5/10

synthetic proxy → 5.0/10

Popularity blends real player search demand (~30 markets) with a catalogue-derived proxy; games without measurable search demand use the proxy alone. Not live play telemetry.

Cite this score

SlotRanker Score: 71 — Champion of the Underworld by Yggdrasil Gaming

https://slotranker.com/yggdrasil-gaming/champion-of-the-underworld#score

How to cite

Slot Summary

Defeating monsters can turn them into wilds in Champion of the Underworld, making its arena battles part of the payout rules. Yggdrasil Gaming continues its 'of the Underworld' series with Hades confronting a new monster cast. Oversized symbols give those confrontations scale, while the combat theme explains why the reel positions change allegiance.

How It Plays

Matching symbols pay across adjacent reels from the left. Multiple matching positions on the same reel create additional winning combinations, so a large symbol can contribute through several occupied positions.

Gigablox places oversized versions of symbols across adjoining cells. Each occupied cell counts as an instance of that symbol, connecting the size of a block to the combinations it can form.

Theme & Atmosphere

The setting is an underground arena watched by a crowd of souls. Its monsters and Hades give the contest a mythological cast, with combat providing the reason for their appearances.

The presentation treats the underworld as a noisy spectacle. Cartoon horror and a metal-influenced soundtrack frame the fights as a staged contest, keeping the atmosphere closer to monster entertainment than solemn mythology.

Fantasy Mythology Fruit Underworld Animals Monsters Battle

Bonus & Free Spins

At least 5 free-spin symbols start the bonus, and the number landed determines the initial spin award. During the round, Hades fights on every spin, with successful encounters contributing to the multiplier counter.

Before playing the awarded spins, the optional gamble offers a chance to increase their number. A failed attempt removes the entire free-spin award, so choosing to gamble puts the unlocked round at risk.

Spec sheet

Champion of the Underworld at a glance.

Identity

Slot nameChampion of the Underworld

StudioYggdrasil Gaming

Released9/29/2022

Math

SlotRanker Score71

RTP94%

VolatilityHigh volatility

Max win10,000×

Bet range$0.20 – $100.00

Player rating4.5 / 5 · 17 votes

Format

Reels6

Paylines4096

Layout6x4

Expected average based on this slot's 94% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$4.80

Cost per session$4.80

Estimate only, for entertainment purposes — treat gambling as entertainment, not a way to make money, and set a budget you can afford to lose.

How long could a bankroll last on Champion of the Underworld? We simulate thousands of sessions from this game's published RTP and volatility — the long-run math, not a prediction of your next spin.

Bankroll ($)Bet per spin ($)Speed

Volatility tier: High

Running simulation…

How this works

Each simulated spin either misses or returns a win drawn from a log-normal distribution, with the hit rate and spread set by the slot's volatility tier (High). The model is calibrated so the average return equals this slot's published RTP (94.00%), with wins capped at its top multiplier (10,000×).

This is a simplified, parametric model of the game's math — not its real paytable. It exists to make the house edge visible over many sessions, so the numbers above are averages across thousands of runs, never a forecast of one.

This is math, not a prediction. Real sessions vary wildly, and no strategy changes a game's built-in house edge. Play for fun, set limits, and never bet more than you can afford to lose.

Where to play Champion of the Underworld

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Compare Champion of the Underworld with other games

	Champion of the Underworld Score 71This game	Serpentina Score 91	Piggy Bjorn 2 Winter is Coming Score 87	Trolling 1000 Score 85	Garden Gladiators Score 82
Identity
Studio	Yggdrasil Gaming	Massive Studios	GameArt	Pragmatic Play	StakeLogic
Released	9/29/2022	3/20/2025	12/20/2022	8/13/2024	3/19/2025
Math
RTP	94%	96.53%	96.91%	96.53%	96.01%
Volatility	High volatility	High volatility	High volatility	High volatility	High volatility
Max win	10,000×	30,000×	80,000×	25,000×	10,000×
Format
Reels	6	7	5	7	5
Layout	6x4	7x7	5x4	7x7	5x3
Paylines	4096	—	50	0	4096
Min bet	0.2	0.1	0.5	0.2	0.2
Max bet	100	100	100	240	20
Features
Progressive	—	—	—	—	—
Wild symbol	✓	✓	✓	—	—
Free spins	✓	✓	—	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	✓	✓	✓	✓	✓
Bonus game	—	—	✓	—	✓
Respins	—	—	—	—	—

Every number is shown as a delta against Champion of the Underworld.

Comparing against

Champion of the Underworld

Yggdrasil Gaming

RTP

94%

Max win

10,000×

Score

Piggy Bjorn 2 Winter is Coming

+ Bonus Game− Free Spins

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