• 9 to A card royals are the low-paying symbols.
• Five glowing World Stones are the high-paying symbols.
• Thor is the wild that stands in for any symbol besides the scatter and Thunderball.
• Thor’s hammer, Mjolnir, is the scatter that activates free spins.
• Thunderball symbols trigger a special feature and pay cash prizes or jackpots

Link & Win

If 6 or more Thunderball symbols appear on the reels, they will become sticky and the rest of the reel positions will be emptied and 4 locked rows are added to the grid. You will be granted 3 respins and if a Thunderball symbol lands in an empty position it will also become sticky and your respin count will be reset to 3. The four upper rows will unlock as you land more symbols. To unlock rows 5, 6, 7, and 8, you will need to land 15, 20, 25, and 30 Thunderball symbols, respectively. The round ends when you have run out of respins, whereupon you will be paid out the values attached to the Thunderballs or, the Mini, Minor, or Major jackpots that are worth 25x, 50x, and 100x your stake, respectively.

The feature also ends if you can fill all the grid positions which will award you the Mega jackpot worth 15 000x your stake.

Free Spins

If 3, 4, or 5 scatters appear on the reels, you will activate free spins. There are 5 free spins options but only the first one will be initially available as you have to trigger the feature a few times or collect a certain number of scatters to unlock the remainder.

The first option is Jotunheim free spins where you get 15 free spins and 2x, 3x and 5x multiplier wilds. 5 feature triggers get you Vanaheim free spins with 12 free spins and 2x, 4x, or 6x multiplier wilds. After 10 feature triggers, you unlock Alfheim free spins with 9 free spins and 3x, 5x, or 8x multiplier wilds and 15 feature triggers get you into Nidavellir free spins with 6 free spins and 5x, 8x, or 12x multiplier wilds.

The option that stands apart is Svartalfheim free spins that requires you to collect 20 pairs of scatters. This option awards you with one free spin and a guaranteed Wildstorm feature activation that will turn up to 5 reels fully wild.

Additionally, while this feature is active, wilds that land on reels 2, 3, or 4 will trigger the Wild Lightning feature and create a highlighted position and any Thor wilds that land on these positions will expand to fill the whole reel.

Thunderstruck Wild Lightning slot offers a thrilling selection of features, but was the developer’s focus a bit off? The slot’s theme is a fitting evolution from its predecessors with cutting-edge animation and a selection of guitar-heavy energetic soundtracks. The Link & Win feature takes centre stage as it holds the game’s maximum winning potential of $240 000, but Hold & Win features are beginning to become commonplace in slot titles and players may begin to yearn for other ways to reach a slot’s top prize. The five different free spins options are aesthetically pleasing and add real depth to the gameplay. This is a well-produced title that will offer hours of entertainment and plenty of decent winning opportunities.

If you like this slot, then check out Egyptian Tombs or 2 Gods: Zeus vs.Thor