Thunderstruck Slot Sites: Top Picks to Play Online in the UK
Written By Jamie Smith
Thunderstruck was a smash hit on its release at UK online casinos in May 2004, with the Microgaming slot helping to usher in an exciting new era for the industry. Thunderstruck is one of the games credited with popularising slot games in the UK, with the game’s formula being copied by countless replicas over the years, with the original still highly playable today.
The top UK online casinos for Thunderstruck boast benefits such as a great welcome bonus backed up by plenty of decent deals for existing customers, like a VIP rewards scheme that helps to encourage repeat visits.
Best Thunderstruck Casino Sites for 2026
| Position | Casino test reports | Rating | Bonus | Special features | Payout rate | Payout duration | Casino Games | To the provider | General terms and conditions |
|---|---|---|---|---|---|---|---|---|---|
 | |||||||||
| 1 | Casumo | 5.0/5 | Up to £100 + 50 Spins |
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Pragmatic Play, Play'n GO, Evolution, Playson, Red Tiger, NOVOMATIC, Hacksaw Gaming, Playtech, Big Time Gaming, Relax Gaming, Blueprint Gaming, Push Gaming, Microgaming, Inspired, Quickspin, ELK Studios, Gamomat, Nolimit City, Triple Edge Studios, Thunderkick, NetEnt, Stakelogic, NextGen Gam, Yggdrasil, Slingo Originals, IGT, Skywind, Just For The Win, Pocket Games Soft, Swintt, Gamevy, Scientific Games, Spearhead Games |
97.23% | 1 - 5 days | 3812 | Claim Your Bonus! | Full T&Cs apply. 18+. New customers only. Opt-in required. 50% Deposit Bonus up to £100 on first deposit. Min deposit £20. 10x wagering on bonus amount. Max £5 per bet. Bonus valid for 7 days. Game, play and payment method restrictions apply. Play responsibly • BeGambleAware.org |
| 2 | 32red | 4.9/5 | Up to £150 |
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IGT, Pragmatic Play, Iron Dog Studios, Relax Gaming, Slingo, ELK Studios, Inspired Gaming, Hacksaw Gaming, Crucible Gaming, Big Time Gaming, , PearFiction, iSoftBet, Rogue, G.Games, Wazdan, Just For The Win, Ino Games, NetEnt, Play'n GO, Games Global, , Prospect Gaming, Wishbone, Reel Kingdom, Nailed IT! Games, Push Gaming, Reel Play, Gameburger Studios, Northern Lights Gaming, Authentic Gaming, OnAir, Evolution Gaming |
96.00% | 1 - 3 days | 2000+ | Claim Your Bonus! | See full terms. 18+ | GambleAware.org New GB customers only. Opt in. Deposit & Stake £10 on slots to get 100 x £0.20 Free Spins on Sweet Bonanza with 10x wagering on free spins. Debit card or instant bank transfer only. Claim within 7 days. Spins expire within 48 hours. Geo restrictions and T&Cs apply. |
| 3 | NetBet | 4.8/5 | Get 100 Free Spins When You Bet £20 |
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Pragmatic Play, Gaming Corps, Playtech, Evolution, Play'n GO, Gamess Global, Inspired, BF Games, NetEnt, Eyecon, ReelPlay, Red Tiger Gaming, G Games, iSoftBet, Relax Gaming, Ygdrasil, IGT, ELK Studios, Push Gaming, Octoplay, Playson, Hacksaw Gaming, Design Works Gaming, Slotmill, Iron Dog Studio, Bragg, GAMOMAT, Skillzzgaming, Wizard Games, Spinomenal, Spinberry, Spribe, 1X2gaming, Wazdan, Realistic Games, SYNOT Games, Quickspin, Skywind, Stakelogic, RAW iGaming, Red Rake Gaming, NOVOMATIC, RubyPlay, Leander, Tom Horn Gaming, Big Time Gaming, Gaming Realms, Booming Games, Ainsworth, BetGames, Lightning Box Games, Just For The Win, Foxium, Neko Games, Fantasma Games, Slot Factory Games, NextGen Gaming |
95.88% | Up to 24 hours | 3700+ | Claim Your Bonus! | Full T&Cs Apply.18+ New customers only. £10 min deposit. Opt-in and Bet £20+ on any slot, 100 Free Spins on Big Bass Splash, £0.10 per spin. Winnings paid as cash, £100 Max win. . Gamble Responsibly GambleAware.org |
| 4 | Mr Vegas | 4.8/5 | 100% up to £200 |
Visa, Mastercard, PayPal, Neteller, Skrill, Bank Transfer, AstroPay, PaysafeCard
1x2gaming, 2 by 2 Gaming, 4 The Player, Acerun, Ad Lunam, Adoptit Publishing, AGS, Ainsworth, Alchemy Gaming, All 41 Studios, Apparat Gaming, Area Vegas, Armadillo Studios, Asylum Labs, Atlantic Digital, Atomic Slot Lab, Aurum Signature Studios, Authentic Gaming, Avatar UX, Bad Dingo, Bally Wulff, Bang Bang, , , BB Games, Bet Digital, Betixon, BF Games, BGaming, Big Time Gaming, Black Pudding Games, Bluberi, Blue Guru Games, Blue Ring Studios, Blueprint Gaming, Boomerang Studios, Buck Stakes Entertainment, Bulletproof Games, Cayetano Games, Circular Arrow, Coin Machine Gaming, Core Gaming, Crazy Tooth Studio, Crucible Gaming, D-Tech, Design Works Gaming, Electric Elephants, ELK Studios, Evolution Gaming, Eyecon, Fantasma Games, FELT, Fortune Factory Studios, Four Leaf Gaming, Foxium, FunFair Technologies, Gacha Studios, Gameburger Studios, Games Inc, GamesLab, Gamevy, Gaming1, Genesis Gaming, Gold Coin Studios, Golden Rock Studios, Gong Gaming Technologies, Greentube, Hacksaw Gaming, Half Pixel Studios, Hammertime, Highlimit Studio, Hot Rise Games, Hungry Bear Gaming, Hurricane Games, IGT, Indigo Magic, Infinity Dragon Studios, Ino Games, Inspired Gaming, Iron Dog Studio, iSoftBet, Jade Rabbit Studios, Jelly Entertainment, Just For The Win, Kalamba, Leander Games, Leap Gaming, Lightning Box, Lucksome, Magic Dreams, Max Win Gaming, Merkur Gaming, , Microgaming, Nailed It! Games, Neko Games, Neon Valley Studios, NetEnt, NetGaming, NextGen Gaming, Nolimit City, Northern Lights Gaming, Old Skool Studios, OnAir, One Touch Games, Oros Gaming, Pariplay, Pear Fiction Studios, Peter & Sons, PF Soft, Pixiu Gaming, Play'n GO, Playson, Playtech, Playzido, Pragmatic Play, Print Studios, Prospect Gaming, Pulse 8 Studios, Push Gaming, QuickSpin, Rabcat, RAW i Gaming, Real Dealer, Realistic, Red 7, Red Rake Gaming, Red Tiger, Reel Time Gaming, ReelPlay, Reflex Gaming, Relax Gaming, Revolver Gaming, Ruby Play, S Gaming, SG Digital, Shuffle Master, Side City, Silverback, Skillzzgaming, Skywind, Slingo, Slingshot Studios, Slot Factory, Snowborn, Spreadhaed Studios, Spin On, Spin Play Games, Spinberry, Spinomenal, Stakelogicm STHLMGAMING, Storm Gaming, Stormcraft Studios, Switch Studios, SYNOT Games, The Games CO, Thunderbolt Gaming, Thunderkick, Tom Horn Gaming, Tochstone Gaming, Trigger Studios, Triple Edge Studios, Wazdan, Welly, Wild Streak, Williams Interactive, Wishbone, Wizard Games |
97.17% | 1 - 5 days | 7500+ | Claim Your Bonus! | Full T&Cs Apply. 18+. New Casino players only. Min. deposit £10. 35x wagering applies within 60 days. Play responsibly. |
| 5 | All British Casino | 4.7/5 | Deposit and wager £10 for 100 Cash Spins |
Visa, Mastercard, PayPal, Neteller, Skrill, Trustly
Amatic, Blueprint, Evolution, IGT, Microgaming, Novomatic, NextGen, Play'n GO, Pragmatic Play, Relax Gaming, Stakelogic, Eyecon, Thunderkick, Big Time Gaming, Inspired, Hacksaw Gaming, NetEnt, Red Tiger, Slingo, ELK Studios, No Limit City |
95.98% | 1 - 5 days | 2689 | Claim Your Bonus! | New players only | Deposit & wager at least £10 to get free spins | Free Spins winnings are cash | No max cash out | Eligibility is restricted for suspected abuse | Skrill deposits excluded | Free Spins value £0.10 per spin | Free Spins expire in 48 hours |18+ Full T&Cs Apply. GambleAware.org Play Responsibly |
Our full Thunderstruck review has all the information players at UK online casino sites need about the Microgaming slot, such as its RTP, payout rates, slot symbols and bonus rounds.
Overview of the Thunderstruck Slot Game
Thunderstruck in Brief:
- Release Date: May 2004
- Type: Video Slot
- Theme: Norse Gods
- Software Studio: Microgaming
- RTP: 96.1%
- Volatility: Medium
- Special Features: Wilds, Free Spins, Multipliers, Scatters
- Bonus Rounds: Free Spins
- How to Trigger Bonus Round: Land 3 or more Free Spins Symbols
Thunderstruck looks a little old-fashioned now, but that makes sense given it is over a decade since players at UK online casinos first spun the reels on the Microgaming release. The Norse gods theme has been the inspiration for countless new slots since, showing there is a high level of appetite for these types of casino games, but Thunderstruck is the original and arguably still the best more than 10 years later.
More About Online Slots
Full Rules & Information About the Thunderstruck Online Slot
Thunderstruck’s layout is a simple one, with just nine paylines in place across the basic 5×3 grid of reels. The paylines are adjustable, which means players can opt to reduce the number of them that are active for each spin of the reels, should they wish to do so. Multipliers on the Thunderstruck slot come into play during the bonus round.
Thunderstruck Factsheet
| Reels | 5 |
| Rows | 3 |
| Paylines | 9 |
| Multipliers | Yes |
| Gamble Feature | No |
| Free Spins | Yes |
| Bonus Games | Yes |
| Jackpot | No |
| Min Bet | £0.09 |
| Max Bet | £5 |
Thunderstruck can be played for just a penny per payline at UK online casino sites, which means it is an entry-level slot to play for those who have a low budget to spend on games.
Thunderstruck Symbols & Payouts
Symbols on Microgaming’s hit slot Thunderstruck start with the usual card icons, before moving on to the higher paying slot symbols such as the castle, the horn, and the lightning icon. The game’s scatter symbol is represented by an icon showing a pair of rams, while the wild icon is depicted by Thor himself.
- All symbols: 13
- Highest-Paying Symbol: Hammer and Hand
- Wilds: Wild
- Paylines Pay: Left to Right
- Maximum Win: 3,333x the stake size
Thunderstruck Bonuses & Features
Compared to new slots, Thunderstruck does not have a lot of bonus features but the free spins round is still one of the best in the business, with players getting 15 free spins if they get three scatter symbols from a single spin.
Within the Thunderstruck free spins bonus round, all wins are multiplied by 3x, which means that the potential payouts on offer here can be very exciting.
It is also possible to retrigger the free spins round if more scatters appear and there is no cap on the number of spins for free that can be awarded when spinning the reels on the Thunderstruck game.
Similar Games & Best Alternatives
Microgaming built on the success of the original Thunderstruck game with a smash hit sequel – Thunderstruck 2 – which is one of the most famous slot games ever
Among the other major releases to come from Microgaming over the years include Immortal Romance and Mega Moolah, which has a huge number of fans at UK online casinos thanks to its progressive jackpot that can pay out gigantic life-changing sums of money to winners.
Still A Casino Classic Today
Microgaming is a legendary creator of slot games with Thunderstruck remaining one of the games that the company is most famous for to this day, thanks to its enduring gameplay.
While the design of the slot game is starting to feel a bit dated – understandably as it was released at UK online casinos more than a decade ago – the fact the bonus game pays out 15 free spins is more than a lot of new slots released today have to offer, so this classic casino slot is still worth a spin.