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Game Rules for Thunderstruck II from Microgaming

Rules for this ferocious slot from Microgaming!

Thunderstruck II

Game Rules for Thunderstruck II

Summary of official Game Rules:

  • Thunderstruck II is a five reel, 243 pay way and 300-coin slot machine.
  • Regular symbols are all symbols on the reels that do not have a bonus feature but complete regular winning combinations on enabled pay ways.
  • Matching symbols must be next to each other on an enabled pay way.
  • Regular winning combinations pay out from left-to-right, so one symbol must be displayed on the first slot reel. A symbol combination starting from the second, third, fourth or fifth slot reel does not pay out.
  • Regular payouts depend on the number of coins you bet per spin. For each spin, the bet amount you choose is automatically multiplied by the bet multiplier.
  • The Thunderstruck Logo symbol is a wild, multiplier symbol.
  • This symbol doubles the payout of any combination it completes as a wild symbol.
  • This symbol does not substitute for the scatter symbol.
  • This symbol creates its own winning combination when multiple symbols appear on a pay way. These payouts are not multiplied.
  • The Bonus Hammer symbol is a scatter symbol.
  • Two or more symbols must appear anywhere on the reels to create a win.
  • This symbol cannot be substituted by the wild, multiplier symbol.
  • Scatter wins are calculated by multiplying the scatter symbol combination payout by the total number of regular coins bet.
  • Scatter payouts depend on your total bet.
  • Scatter and bonus wins are added to regular wins.
  • Three or more Bonus Hammer symbols scattered on the reels, activate the Great Hall of Spins bonus game.
  • Three or more Bonus Hammer symbols scattered on the reels, activate the Great Hall of Spins bonus game.
  • You can play one of four bonus games.
  • After five sequential activations, a bonus game is unlocked.
  • Each bonus game awards free spins with an additional bonus feature.
  • Scatter and bonus wins are added to regular wins.
  • All the bets and pay ways played in the free spins are the same as the spin that activated the bonus game.

The bonus games are:
Valkyrie Bonus Game

  • This bonus game is always unlocked.
  • You are awarded ten free spins.
  • All wins are multiplied by 5 during the free spins.
  • Free spins can be re-activated during the bonus game. The extra free spins are added to the remaining number of free spins.


Loki Bonus Game

  • This game is unlocked when you activate the Great Hall of Spins bonus game five times.
  • You are awarded fifteen free spins.
  • If a Wild Magic symbol is displayed on reel 3, up to fourteen regular symbols are transformed into wild symbols.
  • The Wild Magic symbol pays the same value as the Thunderstruck Logo symbol combinations as displayed on the paytable. The 2x multiplier value does not apply.
  • Free spins can be re-activated during the bonus game.
  • If two, three, four or five Bonus Hammer symbols are scattered on the reels during a free spin, you win one, two, three or four extra free spins respectively. The extra free spins are added to the remaining number of free spins.


Odin Bonus Game

  • This game is unlocked when you activate the Great Hall of Spins bonus game ten times.
  • You are awarded twenty free spins.
  • Any win activates the Wild Raven bonus feature. Random symbols are transformed into a wild, multiplier symbol.
  • You are awarded up to a 6x multiplier value on the payout of any combination it completes as a wild symbol.
  • The bonus game cannot be re-activated during the free spins.


Thor Bonus Game

  • This game is unlocked when you have activated the Great Hall of Spins bonus game fifteen times.
  • You are awarded twenty-five free spins.

This game has a Rolling Reels™ feature:

  • Winning symbol combinations are removed from the reels after you are paid out.
  • The symbols above the removed symbols shift position to fill the empty spaces.
  • This process repeats itself.
  • During the free spins, you are awarded a multiplier value for each rolling reel.
  • The multiplier value increases on every consecutive win. The multiplier value awarded increases by 1.
  • You can win up to a 5x multiplier value.
  • The multiplier value resets to 1x when the cascading symbols do not form a winning combination.
  • The bonus game cannot be re-activated during the free spins.
  • The Wild Storm bonus game is randomly activated during the regular slot game.
  • Up to five reels are transformed into a wild reel.
  • The Thunderstruck Logo symbol and the Bonus Hammer symbol do not appear.
  • Malfunctions void all plays.

Payout Table

Thunderstruck II paytable