Yggdrasil Gaming

Dark Vortex

Slots Video Slots 3D Slots Fantasy Magic Halloween Horror Monsters Mystic Ghost Demon

A portal-expansion slot with a staged bonus entrance

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

96.5%

return to player

Volatility

High volatility

variance

Max win

7,318×

top multiplier

Min bet

$0.10

per spin

Reels

243 lines

Player rating

4.7 ★

11 votes

DEMO Play free, no signup

Yggdrasil Gaming

Embed on your site

4.7 / 5

11 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 96.5% → 9.0/10

Volatility9/10

high → 9.0/10

Win Potential7.7/10

x7318.00 (7318×) → 7.7/10

Features10/10

15 features → 10.0/10

Game Mechanics6.8/10

f=15 r=5 p=243 → 6.8/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility6/10

0.1–50 (×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: 78 — Dark Vortex by Yggdrasil Gaming

https://slotranker.com/yggdrasil-gaming/dark-vortex#score

How to cite

Slot Summary

Opening the portal is only the first stage in Dark Vortex, Yggdrasil Gaming's horror-fantasy slot. Cursed relics start an expanding passage across the reels, with full coverage needed to reach free spins. The supernatural premise becomes a concrete objective: spread the vortex far enough before its available spins run out.

How It Plays

At least three matching symbols on consecutive reels form a win when the combination begins at either outer edge. A full-width combination is counted once rather than paid twice.

Two cursed symbols on adjacent reels open taller Vortex Reels for three spins. Further adjacent cursed symbols extend the passage and add two spins, creating a limited window for expansion.

Bonus & Free Spins

Opening all five Vortex Reels qualifies the game for free spins after the Vortex Spins finish. The bonus uses a 5x5 field with stacked wilds on the central three reels.

Blue orbs determine the number of free spins, while pink orbs increase the wild-stack height. The collections gathered during Vortex play become useful once the full expansion requirement is met.

Spec sheet

Dark Vortex at a glance.

Identity

Slot nameDark Vortex

StudioYggdrasil Gaming

Released10/24/2018

Math

SlotRanker Score78

RTP96.5%

VolatilityHigh volatility

Max win7,318×

Bet range$0.10 – $50.00

Player rating4.7 / 5 · 11 votes

Format

Reels5

Paylines243

Layout5x3

Expected average based on this slot's 96.5% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$1.40

Cost per session$1.40

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 Dark Vortex? 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 (96.50%), with wins capped at its top multiplier (7,318×).

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 Dark Vortex

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Compare Dark Vortex with other games

	Dark Vortex Score 78This game	Evil Eyes Score 82	Hallowin Score 66	Horror Hotel Score 85	Elite of Evil: Portal of Gold Score 74
Identity
Studio	Yggdrasil Gaming	Hacksaw Gaming	Platipus Gaming	Relax Gaming	G.Games
Released	10/24/2018	9/4/2024	10/20/2022	1/25/2023	5/28/2020
Math
RTP	96.5%	96.24%	95%	96.17%	97.5%
Volatility	High volatility	Medium/High	Medium volatility	High volatility	Medium volatility
Max win	7,318×	12,500×	1,380×	20,000×	5,000×
Format
Reels	5	5	5	6	6
Layout	5x3	5x5	5x3	6x6	6x6
Paylines	243	3125	50	0	0
Min bet	0.1	0.1	0.5	0.1	0.2
Max bet	50	5	50	50	1
Features
Progressive	—	—	—	—	—
Wild symbol	✓	—	✓	✓	—
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	✓	✓	✓	—
Multiplier	—	—	—	✓	✓
Bonus game	✓	✓	✓	—	✓
Respins	—	—	—	✓	—

Every number is shown as a delta against Dark Vortex.

Comparing against

Dark Vortex

Yggdrasil Gaming

RTP

96.5%

Max win

7,318×

Score

+ Multiplier+ Respins− Bonus Game

Elite of Evil: Portal of Gold

+ Multiplier− Wild− Scatter

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