There are 3 rows and 5 reels in the game, and 243 ways to win. The minimum bet in the game is 0.30, and the max is 60. This is split between a maximum coin value of 0.20 and a 10-coin maximum per bet. The volatility of the game is medium, and its Return to Player (RTP) percentage is also standard at 96.65%. This makes for a safer betting experience, but not too safe, as to be boring.
There are 14 pay symbols in the game in total, 12 regular ones and 2 premium ones. The low-value ones are 6 and are the default playing card symbols of 9 to A. The high-value ones are also 6 and depict awe-inspiring images of Valhalla, Viking ships, and Norse gods. Their value can be seen in the paytable. The two premium symbols are the Thunderstruck II logo and Thor’s hammer. The game logo acts as a Wild, substituting any symbol, except for the hammer, to complete a set. It also acts as a 2x multiplier on any wins made with its help. Thor’s hammer, on the other hand, is a Scatter symbol. If you land 3 or more of these, you will gain access to the Great Hall of Spins.
The Great Hall of Spins is the game’s free spin feature; however, it has a progression-based spin on it. Upon being granted access to this sacred hall, you will only have the choice of Valkyrie at first. She will offer 10 free spins and a 5x multiplier on all wins from these. And this is where the progression kicks in. With every 5 entries to the Great Hall, you will be awarded a new god’s boon that you will be able to choose when starting the feature. There is Loki, who will grant you 15 free spins with the Wild Magic ability. Wild Magic symbols appear on the third reel and will transform random symbols on the board into substitutes. Odin is the next god, available after 10 entries. He will give you 20 free spins with the Wild Raven Feature. These ravens will land on random symbols, turning them into 2x and 3x multipliers. Should both land on the same symbol, it will be transformed into a 6x multiplier. And lastly, there is the mighty Thor, who will grant you his blessing after 15 visits to the Grand Hall. Thor will bless you with 25 free spins, featuring rolling reels. This essentially turns the game into a cascading slot, with matching symbols exploding and new ones falling into their places. There is also a progressive multiplier applied in this mode that goes from 2x up to 5x.
Another feature of the game is the Wildstorm. These are triggered at random times during the game and will see Thor come down from the skies, turning up to 5 reels Wild. Getting all 5 Wild reels will land you the biggest jackpot in the game, which is 8100x your bet. Truly godlike.
The bottom line
Thunderstruck II is a tried and true slot game that has stood the test of time and remains a fan favourite for many. The design is a classic Norse setting, although a bit dated, given the game’s age. It is not very volatile, so don’t expect too many ups and downs. However, it does have a lot of features for its period. This slot is definitely for those seeking a trip down memory lane.