Thunderstruck

A wild that pays double, not just fills a gap

In most slots, a wild symbol completes a line and does nothing else. Thor does more in Thunderstruck. He stands in for every symbol except the Ram scatter, and any win he is part of is doubled. A line that would not have paid at all can become a paying line, and then pay at twice its normal value.

That one rule carries much of the base game. Otherwise Thunderstruck is a spare design, with one wild, one scatter, one free spins round and an optional gamble. Microgaming first released it. Games Global, which bought the Microgaming catalogue, now calls it the original Thunderstruck title. Games Global’s own Q&A puts the launch in 2003, while many listings give 2004.

This page covers that first game only. Thunderstruck II, Wild Lightning, Stormchaser, Gold Blitz Extreme and FlyX are separate releases with their own rules.

Key specifications

The 96.1% return comes from independent listings, several of which agree on it. Games Global does not publish an RTP for this title. A lower version, listed at 91.94%, also exists, so the return can depend on which version an operator runs. RTP is a long-run average across a very large number of spins. It tells you nothing about a single session.

The studio does not publish a volatility rating, and third-party sites disagree with each other, so there is no reliable rating to quote.

Nine lines across fifteen positions

The reels form a 5×3 grid with nine paylines. Wins are counted from left to right along active lines.

Most listings describe the lines as adjustable, so you can choose to play fewer than nine. That lowers the cost of each spin. However, a line that is switched off cannot pay, even if a matching run of symbols lands across it. The demo lets you test this freely: play a stretch on all nine lines, then on fewer, and count how many landed combinations go unpaid.

Nine lines across fifteen positions leaves plenty of symbol arrangements sitting on no line at all. Each line win therefore depends on a fairly specific landing, which is why the Thor wild matters so much. One wild in the right place can complete a line that would otherwise miss, and doubling the result gives the base game most of its bigger moments.

The Ram scatter works on a different basis. Its payout is calculated on the total bet rather than on a single line, and Thor cannot stand in for it.

After a win, the game offers an optional gamble feature. It sits outside the main game, and you can decline it and keep the win.

Rams, fifteen free spins and wins at three times

There is one bonus round. Three or more Ram scatters award 15 free spins, and every win during those spins is tripled.

The Ram is a paying symbol as well as the trigger, with its prize set against the total bet. Once the free spins begin, the round adds just one thing, the 3x multiplier on all wins. There are no picks, no levels to unlock and no later stage that changes the rules. The paylines, the wild and the scatter all keep the same jobs they have in the base game.

That simplicity makes demo results easy to read. If a round returns little, it is because few winning lines landed during those 15 spins, not because a hidden feature failed to switch on.

There is no bonus buy. The only way into the round is to land the scatters.

The top prize: a coin figure, not a multiplier

Games Global does not publish a maximum win multiplier for Thunderstruck. Third-party listings range from 500x to 10,000x, and one site gives two different figures on the same page. None of them can be treated as authoritative.

Older listings describe the top line prize as 10,000 coins for five Thor wilds on a line. That is a coin amount, not a multiple of the stake, and turning it into a multiplier would need details the studio does not publish. It is best read as the game’s highest-paying combination rather than a confirmed ceiling.

How often that combination lands is not published either, as the studio gives no hit frequency and no volatility rating. Five of the same symbol on one active line is a narrow target on a nine-line game, but there is no official number to measure it against. Treat any large result in the demo as an outlier, not something to expect again.

Who will get the most from the demo

• Players who like older, easy-to-follow slots where every rule fits on one help screen.
• Anyone curious about the game that started the Thunderstruck name, before trying the later releases.
• People who want to see how a doubling wild and a tripled free spins round shape results on a small number of lines.
• Readers comparing RTP versions, since the 96.1% and 91.94% figures show how far a single title can vary.

It is a poorer fit if you want multi-stage bonus rounds, large grids or an official volatility rating. Thunderstruck offers one feature round, nine lines and no published figures beyond what its rules describe.

Thunderstruck questions answered

What is the RTP of Thunderstruck?

Independent listings give 96.1%. Games Global does not publish one, and a lower version listed at 91.94% also exists.

How do the free spins work?

Three or more Ram scatters award 15 free spins, and every win during them is tripled.

What does the Thor wild do?

Thor substitutes for every symbol except the Ram scatter and doubles any win he is part of.

Is this the same game as Thunderstruck II?

No. This is the original game, which Games Global dates to 2003. The sequels are separate releases with their own rules.

Can you buy the free spins round?

No. There is no bonus buy, so the round only starts when the Ram scatters land.