Thunderstruck 2 is the sequel to the popular Thunderstruck video slot, and it must be said that it is a pretty fantastic sequel. The graphics, sound and gameplay have all be improved several times over. Considering that Thunderstruck was a pretty good slot, that's really saying something. First of all, the Thunderstruck 2 video slot uses the all-pays system. As long as you get the required number of symbols in a row, starting on the leftmost reel going right, you win. No bet lines are used. The Thunderstruck 2 logo is used as a Wild Substitution, and can act as any other symbol to determine wins, except during the Wildstorm Feature. This one can be triggered at any time, and will turn a random number of reels into Wilds. In fact, it can turn all the five reels wild, if you’re lucky! Thor's hammer is used as a Scatter Bonus. This means that, on one hand, as long as there are at least 2 of them, you win a prize, even if they're not in sequence from left to right. What you're really after though, is entrance into the Hall of Spins, which requires at least three hammers. In there, there'll be four different sets of Free Spins available. Valkyrie, Loki, Odin and Thor. At first, only the Valkyrie one will be available, but the others will unlock the more times you gain entrance. Thor is the last one, and will be available from the 15th entrance on. The Thor Free Spins might be the best, but even what the lowly Valkyrie offers is great – 10 Free Spins with a x 5 prize multiplier is nothing to scoff at!