GG Gaming

Underworld Inferno

An infernal line slot with an uneven payout profile

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

96.01%

return to player

Volatility

High volatility

variance

Max win

25,000×

top multiplier

Min bet

$0.10

per spin

Reels

15 lines

Player rating

4.5 ★

13 votes

DEMO Play free, no signup

GG Gaming

Embed on your site

4.5 / 5

13 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 & RTP9/10

RTP 96.01% → 9.0/10

Volatility9/10

high → 9.0/10

Win Potential8.8/10

x25000.00 (25000×) → 8.8/10

Features5.5/10

8 features → 5.5/10

Game Mechanics4.4/10

f=8 r=5 p=15 → 4.4/10

Context signals (tie-breakers)

Layout5/10

5x5 → 5.0/10

Bet Flexibility4/10

0.1–10 (×100) → 4.0/10

Provider Reputation7.7/10

provider avg 7.7 → 7.7/10

Popularity7.5/10

synthetic proxy → 7.5/10

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: 73 — Underworld Inferno by GG Gaming

https://slotranker.com/g-g-gaming/underworld-inferno#score

How to cite

Slot Summary

In 2026, GG Gaming released Underworld Inferno with a hell setting and a high-volatility payout profile. The infernal presentation accompanies a game where reel modifiers and multiplied wilds can change the weight of a result. Its larger field still resolves through line combinations, keeping the underlying matching rule straightforward despite the feature activity.

How It Plays

The five-by-five field uses 15 paylines. Ordinary combinations begin on the leftmost reel and continue across neighboring reels, so scattered matching symbols do not automatically form a line win.

A random reel modifier operates alongside those line rules. The field's size therefore describes where symbols can land, while the active paylines determine which ordinary combinations receive an award.

Bonus & Free Spins

Scatter symbols open the free-spins round. Random multipliers can alter awards during the feature, and additional free spins can extend play beyond the original allocation.

Spec sheet

Underworld Inferno at a glance.

Identity

Slot nameUnderworld Inferno

StudioGG Gaming

Released

Math

SlotRanker Score73

RTP96.01%

VolatilityHigh volatility

Max win25,000×

Bet range$0.10 – $10.00

Player rating4.5 / 5 · 13 votes

Format

Reels5

Paylines15

Layout5x5

Features

Themes

Expected average based on this slot's 96.01% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$1.60

Cost per session$1.60

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 Underworld Inferno? 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 (96.01%), with wins capped at its top multiplier (25,000×).

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 Underworld Inferno

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Compare Underworld Inferno with other games

	Underworld Inferno Score 73This game	Inferno Mayhem Score 81	Hell Chef Score 81	Hades Cerberus Riches Score 78	Hades: Realm of Fortune Score 77
Identity
Studio	GG Gaming	PG Soft	Kalamba Games	Fantasma Games	Mancala Gaming
Released	—	—	10/20/2023	—	—
Math
RTP	96.01%	96.76%	96.42%	96.24%	95%
Volatility	High volatility	Medium/High	High volatility	High volatility	High volatility
Max win	25,000×	25,000×	1,000×	10,000×	20,000×
Format
Reels	5	5	5	5	5
Layout	5x5	5x5	5x3	5x3	5x3
Paylines	15	Cluster Pays	15625	10 (Bothway)	20
Min bet	0.1	0.2	0.2	0.2	0.1
Max bet	10	100	50	100	180
Features
Progressive	—	—	—	—	✓
Wild symbol	✓	✓	✓	✓	✓
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	✓
Multiplier	—	✓	—	✓	—
Bonus game	—	—	✓	—	✓
Respins	—	—	—	—	✓

Every number is shown as a delta against Underworld Inferno.

Comparing against

Underworld Inferno

GG Gaming

RTP

96.01%

Max win

25,000×

Score

Hades Cerberus Riches

Hades: Realm of Fortune

+ Progressive+ Bonus Game+ Respins

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