Thunderstruck II
Thunderstruck II was developed by Microgaming (now known as Games Global), this online video slot was launched in 2010 and instantly became a fan favourite. The slot has a common layout of 5 reels with three rows and 243 paylines. This sequel to...
Reviewed by A. Lynch
·
Updated: 2026-04-15
| Provider | Games Global |
| RTP | 96.65% (varies) |
| Reels | 5 × 3 |
| Paylines | 243 |
| Max Win | Up to 8000x |
| Bet Range | £0.3 – £15 |
| Themes | viking |
| Released | 2010-05-05 |
| Technology | HTML5 |
| Updated | 2026-04-15 |
- RTP: 96.65% (varies)
- Max Win: Up to 8000x
- Provider: Games Global
- Reels: 5 × 3
- Best Casino: SpinGenie (9.30/10)
Where to Play Thunderstruck II
Thunderstruck II RTP and Wagering
This popular online video slot was developed by Microgaming back in 2010. Although it is quite an old game it is still popular among slot players because of all the great bonus features included in the game. It features a 5x3 reel layout with 243 ways to win. The game is set in a mystical world of Norse mythology, with symbols such as Thor's Hammer, Valkyries, and Odin. The wagering range allows players to bet from as low as £0.30 per spin up to a maximum of £15 per spin. The coin value per spin ranges from £0.01 to £0.05.
The maximum possible win is up to 8000x your bet. To trigger the maximum win of your stake you must land five Thunderstruck II logo symbols on an active payline during the Wildstorm feature or Loki Free Spin. The game has a long-term Return to Player (RTP) rate of 96.65%, which is considered to be slightly higher than the average RTP for online video slots. However, you need to keep in mind that this is a theoretical percentage based on very complex calculations and does not guarantee that you will get back that amount.
Thunderstruck II Symbols and Audio & Video Design
Based on Norse mythology, Thunderstruck II is specifically about the sagas of Thor, Odin, Loki, and the Valkyries. The game's design echoes this theme, with symbols including various depictions of the gods and goddesses. Its audio design accentuates an epic orchestral soundtrack, adding to the game's sense of adventure and excitement. It is also important to mention that Microgaming remastered this game in 2020 to upgrade the graphics and add new animations and sounds.
In terms of symbols, the game contains an assortment of symbols. This comprises the standard playing card symbols of 9,10, J, Q, K, and A, and symbols like Thor's hammer, the longship, and the three Norse gods: Thor, Odin and Loki. There is also the demi-goddess Valkyrie symbol.
Thor is the highest-paying standard symbol that offers 16.66 times your stake. The Thunderstruck II logo is the game's wild symbol that can be swapped for any other symbol. Thor's hammer symbol is the game's scatter symbol.
Here is a breakdown of all the symbols and their specific payouts.
Nine
3 = 5x bet / 4 = 10x bet / 5 = 100x bet
Ten
3 = 5x bet / 4 = 10x bet / 5 = 100x bet
Jack
3 = 7x bet / 4 = 15x bet / 5 = 125x bet
Queen
3 = 7x bet / 4 = 15x bet / 5 = 125x bet
King
3 = 10x bet / 4 = 20x bet / 5 = 150x bet
Ace
3 = 10x bet / 4 = 20x bet / 5 = 150x bet
Longship
3 = 0.5x bet / 4 = 1.66x bet / 5 = 8.33x bet
Asgard
3 = 0.5x bet / 4 = 1.66x bet / 5 = 10x bet
Valkyrie
3 = 0.66x bet / 4 = 2.66x bet / 5 = 11.66x bet
Loki
3 = 0.66x bet / 4 = 2.66x bet / 5 = 13.33x bet
Odin
3 = 1x bet / 4 = 3.33x bet / 5 = 15x bet
Thor
3 = 1x bet / 4 = 3.33x bet / 5 = 16.66x bet
Wild
3 = 2.5x bet / 4 = 6.66x bet / 5 = 33.33x bet
Scatter
2 = 1x bet / 3 = 2x bet / 4 = 20x bet / 5 = 200x bet
Thunderstruck II Mobile Features
The game has been programmed using HTML5 technology, so you do not need a separate mobile app or software download. Thunderstruck II's interface and controls are eligible for touch screens. It is compatible with iOS and Android devices, guaranteeing players an enjoyable game experience on various mobile devices.
Thunderstruck II Bonus Features
Thunderstruck II’s popularity definitely stems from the different bonus games within the game. In addition to its regular symbols and payouts, players can trigger various bonus games and free spin features by landing specific symbols on the reels. Here I will go through each bonus game and explain how to trigger them and what they can offer the player.
The Great Hall of Spins
The Great Hall of Spins is Thunderstruck II's main bonus feature. This bonus game is triggered by landing three or more scatter symbols anywhere on the reels. Players can unlock four different levels of free spins in this feature, each with unique features and payouts. The more you trigger the Great Hall of Spins, the higher your chances of unlocking the higher levels. This is very similar to the free spins levels within Immortal Romance. There is also a progress bar which clearly shows you which level you have achieved so far.
Valkyrie Free Spins
The Valkyrie Free Spins feature is the first level of the Great Hall of Spins. Players get ten free spins with a 5x multiplier on all wins. You can trigger more respins while playing this feature to get up to 20 free spins in total. The max possible win per free spin in this particular game is up to 1,383x times your bet.
Loki Free Spins
The Loki Free Spins feature is the second level of the Great Hall of Spins and is unlocked after triggering the Great Hall of Spins five times.In this feature, players get 15 free spins with an added bonus symbol called the Wild Magic symbol. If this symbol lands on reel 3 it will randomly turn other symbols on the reels into wilds. The max possible win within this bonus game is up to 8,000x your bet.
Odin Free Spins
The Odin Free Spins feature in Thunderstruck II is the third level of the Great Hall of Spins. It is unlocked after triggering the Great Hall of Spins 10 times. In this feature, players are awarded 20 free spins, with a unique Wild Raven symbol that can randomly turn other symbols on the reels into 2x or 3x multipliers. If you manage to land both raven symbols at the same time you will get a 6x multiplier.
Thor Free Spins
The Thor Free Spins feature is the final level of the Great Hall of Spins. Players can unlock this level after triggering the Great Hall of Spins 15 times. This feature awards 25 free spins to players along with the Rolling Reels feature. This boosts the multiplier on each consecutive win up to 5x.
Thunderstruck II Jackpot
This noteworthy online slot game does not have a progressive jackpot but with a possible max win of up to 8,000x your bet, this can lead to an interesting win amount.
Thunderstruck II Final Thoughts
This popular online video slot developed by Microgaming has a lot of different bonus game features which made it one of the most popular slot games when it was released back in 2010. It is still a very popular game which has spawned many sequels and variations. Microgaming is still spending time on this game with a remastered version coming out in 2020. Its mobile features, immersive graphics, and epic orchestral soundtrack make it an enjoyable experience for players and a great game to try out.
We give this game a rating of 9.0/10.