UKGC 65519 · Bonne TerreUKGC account 65519 · Bonne Terre Gaming Limited
Thunderstruck 2 at Sky Casino
The Games Global classic from 2010 is in the Sky lobby. Here is how it plays, which RTP version Sky lists, and what a sensible budget looks like before you spin.
- 243 ways5 reels, 3 rows
- 94.13% RTPas listed by Sky Vegas
- 8,000xmaximum win
- 4 bonus levelsGreat Hall of Spins
New UK customers 18+ · spins worth £0.10 each on 8 Age of the Gods slots · 30-day expiry · T&Cs apply
Thunderstruck 2 is a five-reel, 243-ways Norse slot by Games Global (formerly Microgaming). Its default RTP is 96.65%, but the Sky Vegas game page lists 94.13%. The main draw is the Great Hall of Spins, where four free-spin rounds unlock as you trigger it more often.
Thunderstruck 2 at a glance
- Studio
- Games Global (Microgaming), released 2010
- Layout
- 5 reels, 3 rows, 243 ways to win
- RTP
- 96.65% default; 94.13% on the Sky Vegas game page
- Volatility
- Medium to high
- Maximum win
- 8,000x your stake in a single round
- Stakes
- From £0.30 a spin, capped at £5 in the UK (£2 if you are 18 to 24)
RTP and volatility
Games Global supplies Thunderstruck 2 in more than one RTP setting, and the operator picks which one to run. The best-known figure is 96.65%. The Sky Vegas game page, which shares the Sky account and lobby with Sky Casino, lists 94.13%. That gap is about £2.50 in theoretical return for every £100 you stake over the long run. It will not decide a single session, but it adds up.
Always open the game's info panel before you play. UK operators have to show the RTP inside the game, and that number is the one that counts.
Volatility sits in the middle of the range. The base game ticks over with small hits, doubled whenever a wild helps form the line. Most of the value is saved for the free spins, and Thor's round in particular.
RTP by operator and a bankroll calculator
| Where | RTP shown | Theoretical return per £100 staked |
|---|---|---|
| Games Global default build | 96.65% | £96.65 |
| Sky Vegas game page (same Sky account) | 94.13% | £94.13 |
| MrQ game page | 96.65% | £96.65 |
| Fluffy Spins game page | 96.65% | £96.65 |
Swipe to see all columns
As listed on each operator's public game page in September 2026. Always confirm in the game's info panel.
Averages over a very long run. A high-volatility slot can end a session far sooner, or far later.
How the game works
Wins pay left to right on adjacent reels, 243 ways, so symbol position on a reel does not matter. The Thunderstruck 2 logo is wild. It substitutes for everything except the scatter and doubles any win it is part of.
The scatter is Thor's hammer. Three or more anywhere open the Great Hall of Spins, and each trigger is counted and saved against your account. That is why the game rewards coming back to it rather than a single short session.
Bonus features
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Wildstorm
At random in the base game, up to five reels turn fully wild. It is rare and it is where many of the big base-game hits come from.
-
Valkyrie — from the first trigger
10 free spins with a 5x multiplier on all wins.
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Loki — from the fifth trigger
15 free spins. Loki's Wild Magic turns random symbols on reel 3 wild.
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Odin — from the tenth trigger
20 free spins. Wild Ravens add 2x or 3x multipliers, or 6x when both land on a win.
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Thor — from the fifteenth trigger
25 free spins with Rolling Reels, where consecutive wins raise the multiplier up to 5x.
Maximum win
The ceiling is 8,000x the stake in one round, so £40,000 at the UK maximum of £5 a spin. Realistically the big results come from Wildstorm or from Thor's round with a rolling multiplier. Treat 8,000x as a cap, not a target.
Thunderstruck 2 demo
Free-play versions still exist, but UK-licensed casinos cannot show them before you have verified your age. That is a Gambling Commission rule from 2019. At Sky that means registering and passing the checks before a demo opens.
A demo is worth ten minutes for one reason: to see how often the scatter lands for you and how long the dry spells feel. Just remember the demo cannot tell you which RTP version the real-money game runs.
Where to play it at Sky
Search "Thunderstruck" in the lobby. Sky Casino and Sky Vegas share one login, so the game is reachable from the same account. The welcome spins do not work here. They are locked to Age of the Gods titles, so Thunderstruck 2 is played with cash.
If you want no-wagering spins first, see our Sky Casino bonuses guide or the £20 deposit breakdown. Then come back to Thunderstruck 2 with what is left.
How we would play it
Pick a stake that lets you reach the Great Hall several times, because the later rounds are where the game gets interesting. On a £50 budget that means 30p or 50p spins rather than £2. The calculator above shows how quickly a bigger stake eats the same budget.
Keep in mind that trigger progress is saved per account, not per session. Stopping after a Valkyrie round is fine: the count is there next time. Chasing Thor in one sitting is the most common way this game turns expensive.
Set a loss limit before you open the game and use the reality check reminder in your account. Both are covered in our Sky Casino security guide. UK rules also mean there is no autoplay and no turbo spin, so each spin takes at least 2.5 seconds.
Thunderstruck 2 at Sky — FAQ
The Sky Vegas game page lists 94.13%, below the 96.65% default. Check the info panel inside the game for the version your account is served.
Trigger the Great Hall of Spins 15 times. Each trigger is saved, so the progress carries over between sessions.
No. The 100 welcome spins only work on the Age of the Gods slots named in the promotion.
Online slot stakes are capped at £5 a spin, or £2 if you are aged 18 to 24.
Only after you have registered and verified your age, which UK rules require before any free play.
8,000x your stake in a single round.
Heading to the Great Hall?
Take the 100 no-wagering welcome spins on Age of the Gods first, then load up Thunderstruck 2 with cash.