Games Global

Thunderstruck II

Slots Video Slots Action & Adventure Mythology Ancient Viking Thunderstorm

Thunderstruck sequel with unlockable Norse Free Spins choices

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

96.65%

return to player

Volatility

Medium volatility

variance

Max win

8,000×

top multiplier

Min bet

$0.30

per spin

Reels

243 lines

Player rating

3.9 ★

17 votes

DEMO Play free, no signup

Games Global

Embed on your site

3.9 / 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 & RTP9/10

RTP 96.65% → 9.0/10

Volatility8/10

medium → 8.0/10

Win Potential7.8/10

x8000.00 (8000×) → 7.8/10

Features10/10

14 features → 10.0/10

Game Mechanics8.5/10

f=14 r=5 p=243 → 8.5/10

Context signals (tie-breakers)

Layout6/10

5x3 → 6.0/10

Bet Flexibility4/10

0.3–5 (×17) → 4.0/10

Provider Reputation6.7/10

provider avg 6.7 → 6.7/10

Popularity4.1/10

search demand p48 + proxy blend (70/30) → 4.1/10

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: 76 — Thunderstruck II by Games Global

https://slotranker.com/games-global/thunderstruck-ii#score

How to cite

Slot Summary

Thunderstruck II followed the original Thunderstruck in 2010, widening its Viking and Mythology identity through Thor, Odin, Loki, and the Valkyrie. The sequel's lasting distinction is the Great Hall of Spins, where repeated triggers unlock different Free Spins options rather than repeating one fixed round. Games Global now carries a Microgaming design that joins 243 Ways with random Wild reels, Cascading wins, and rising Multipliers.

How It Plays

The 243 Ways system checks matching symbols across adjacent reels from the left, removing the need to follow drawn paylines through the grid.

A random Wild Symbol event can convert several reels at once. This gives regular play a sudden full-reel substitution event outside the Great Hall of Spins.

Theme & Atmosphere

Ancient Mythology and Viking imagery place Thor, Odin, Loki, and the Valkyrie at the center, with the thunderstorm motif linking the gods to major feature changes.

Each figure also marks a different Free Spins option, so the Norse cast serves a mechanical purpose instead of appearing only as high-value character symbols.

Action & Adventure Mythology Ancient Viking Thunderstorm

Features & Win Potential

The Wild Symbol substitutes for regular symbols, and combinations involving it can receive a Multiplier. Random activation can also spread Wild Symbols across several reels.

Free Spins modes divide their emphasis between Multipliers, added Wild Symbols, transformed symbols, and Cascading wins. The selected mode determines which behavior controls the round.

High volatility Free Spins Multiplier Scatter Symbol Wild Symbol Cascading Medium volatility 5 Reels Bonus Game 243 Ways Expanding Symbols RTP range 96% RTP Avalanche

Bonus & Free Spins

Three or more Scatter Symbols open the Great Hall of Spins. Further triggers unlock additional Free Spins selections, culminating in a Cascading option whose Multiplier can rise through consecutive wins.

Spec sheet

Thunderstruck II at a glance.

Identity

Slot nameThunderstruck II

StudioGames Global

Released5/5/2010

Math

SlotRanker Score76

RTP96.65%

VolatilityMedium volatility

Max win8,000×

Bet range$0.30 – $5.00

Player rating3.9 / 5 · 17 votes

Format

Reels5

Paylines243

Layout5x3

Features

Themes

This game is searched most in United Kingdom, Canada, and United States.

Expected average based on this slot's 96.65% RTP — individual sessions vary with volatility.

Bet per spin

Spins per hour400

Session length (hours)

Cost per hour$4.02

Cost per session$4.02

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 Thunderstruck II? 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: Medium

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 (Medium). The model is calibrated so the average return equals this slot's published RTP (96.65%), with wins capped at its top multiplier (8,000×).

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 Thunderstruck II

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Compare Thunderstruck II with other games

	Thunderstruck II Score 76This game	Divine Fortune Score 80	Fire Lightning Score 76	Lightning Strike Megaways Score 74	7×7 Thor Score 73
Identity
Studio	Games Global	NetEnt	BGaming	Blueprint Gaming	4ThePlayer
Released	5/5/2010	1/25/2017	7/16/2018	2/14/2019	3/27/2025
Math
RTP	96.65%	96.59%	97.61%	96.5%	94%
Volatility	Medium volatility	Medium volatility	Medium/High	Medium volatility	High volatility
Max win	8,000×	—	1,000×	—	—
Format
Reels	5	5	5	6	6
Layout	5x3	5x3	5x3	6x3	6x4
Paylines	243	20	20	15625	Pay Anywhere
Min bet	0.3	0.2	0.01	0.1	0.2
Max bet	5	200	20	50	80
Features
Progressive	—	✓	—	—	—
Wild symbol	✓	✓	✓	✓	—
Free spins	✓	✓	✓	✓	✓
Scatter symbol	✓	—	✓	✓	✓
Multiplier	✓	—	—	✓	✓
Bonus game	✓	✓	—	✓	—
Respins	—	✓	—	✓	—

Every number is shown as a delta against Thunderstruck II.

Comparing against

Thunderstruck II

Games Global

RTP

96.65%

Max win

8,000×

Score

+ Progressive+ Respins− Scatter− Multiplier

− Multiplier− Bonus Game

Lightning Strike Megaways

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01Is Thunderstruck II a sequel?

Yes. Thunderstruck II follows the original Thunderstruck and expands the series through a larger Norse cast and a multi-stage Great Hall of Spins Bonus Game.

02How do the 243 Ways produce wins?

Matching symbols pay when they appear on consecutive reels from left to right. Their row positions do not need to follow a fixed payline.

03What is unlocked in the Great Hall of Spins?

Repeated Bonus Game triggers open Free Spins choices associated with the Valkyrie, Loki, Odin, and Thor. Each choice changes the added Multiplier, Wild Symbol, or Cascading behavior.

Series

Thunderstruck

View all 3 games

Game	Year	RTP	Volatility	Slot Score
ThunderstruckGames Global	2004	96.1%	Medium volatility	68
Thunderstruck IICurrentGames Global	2010	96.65%	Medium volatility	76
Thunderstruck II Mega MoolahLatestGames Global	2022	92.01%	High volatility	58

Thunderstruck
Games Global · 2004
RTP96.1%Score68Medium volatility
Thunderstruck IICurrent
Games Global · 2010
RTP96.65%Score76Medium volatility
Thunderstruck II Mega MoolahLatest
Games Global · 2022
RTP92.01%Score58High volatility