Thunderstruck II's gameplay is also an upgrade on the original, though it still takes the form of a 5-reel slot. While the first Thunderstruck pokie had just 9 lines, Thunderstruck II has 243 ways to win. As a result players can expect to enjoy regular wins, although many will be equal to or less than the original bet.
The free spins bonus round has also had been given a serious revamp, with three or more bonus hammers earning players a trip to the Great Hall of Spins. The interesting thing here is that the more you play, the bigger advantage you get in the bonus round.
For the first few times you visit, you get 10 free spins with a multiplier of 5x but from your fifth visit onwards you'll get more spins, extra wilds and extra multipliers. From your 15th visit onwards, you'll get 25 free spins with rolling reels and a multiplier up to 5x.
You can think of this as a sort of loyalty bonus, and it's one that's kept plenty of players coming back to Thunderstruck II time and time again. There's also a mobile version to try if you can't bear to be away from Thor and his pals for too long!