Thunder Shields Slot Review

(2 votes)
TOP slot provider Fantastic graphic Multi-Paylines slot
Thunder Shields Details
Release Nov 2020
Provider iSoftBet
Max. RTP 96.00%
Reels 5
Paylines/Ways 40
Betting Range (€/$) 0.40 - 40
Max. Payout 4,035x
Progressive Jackpot No
Megaways No

Thunder Shields is the latest game that iSoftBet is offering, a slot machine which belongs to the same category as several of the other releases we’ve seen lately from them. I’m talking about the Hold & Win series, which relies on re-spin mechanics and fixed jackpots, often enough available in the exact same form in each game. Not a big fan of the lack of variation in this series, but you will find that changes were made for Thunder Shields, and that might just make it worth trying.

You get to play on 5x4 reels, where you will find a total of 40 active lines. Through them, and the various features involved (mainly re-spins, but also multipliers and other modifiers), you could walk away with a jackpot of up to 4,035x the stake. The slot’s RTP is as expected, at 96%, while the volatility is above average.

Betting and Prizes

The wagers will take into account that the game uses 40 lines, and will require a minimum investment of $0.40 per spin ($0.01 used on each line). Give that wager a boost, even up to $40, and the line bet changes automatically and it will go as high as $1.

With the game’s main feature delivering its biggest wins, and if multipliers apply as well, wins of up to 4,035x the stake should be possible for a single round. It’s a lot less impressive if you check out the regular combinations alone, as those offer up to 6.25x per payline, or 250x if you take the full screen into account.

With medium-high volatility, but also with a 96% RTP, Thunder Shields is the type of game that we’d expect a lot of players to enjoy, without being unfair if you take a look at its long-term prospects.

Thunder Shields Slot Features

You will find that wild symbols are going to be available, used as substitutes, as you’d expect. They have an additional ability here though, and they’re involved in Colossal Respins.

A Colossal Respin will unite the first two columns, and then it will give you a respin. The colossal area offers a single giant symbol. If there is another wild which appears during that respin, the feature continues and adds an extra reel to the giant area. Eventually you could end up with giant symbols in a 4x4 area (first four reels). A 2x multiplier gets applied once you get to 4 respins, and then you go to 3x, 4x and so on, as you get additional respins by landing new wilds.

Stacked mystery symbols will also be among those that you will get in view, and they’re a lot of fun to play through, since they deliver a lot of regular symbols of the same type, at least once they get an opportunity to transform.

Another feature that will incorporate a mystery mechanic, is a random one which gives you Mystery Spins. 3 or more reels are going to have mystery symbols on them, and they will then transform into a single type of symbol.

As for the Hold & Win bonus game, the one that is so common in new slots these days, it’s going to trigger via special Cash Shield icons. These land scattered and they have a prize on them, with a maximum value of 250x the stake. They’re useless if you only get a few, as at least six are needed to trigger the feature.

Hold & Win relies on the triggering symbols, which become sticky, and on 3 respins where you’re trying to get additional Shields to appear. If that happens, the respins reset back to 3. Besides the prizes mentioned on the shields, there are also others which can bring you 2x multipliers, additional reels, bigger cash values, a bigger number of respins or the option to collect shields to free spaces up for others.

The same Hold & Win feature incorporates several fixed jackpots, ranging from 10x to 1,000x the stake.

Theme & Design

The theme in Thunder Shields is going to rely on Viking warriors and their ships. In fact, the reels appear to be carried onboard one of their longboats, with round wooden shields placed to its sides. The reels are populated with Royals which have a standard design, but luckily there are the Viking warriors among its symbols as well. There are four men and one woman among the members of the crew that is visible on the reels.

An excellent design, I did enjoy it, and it’s the kind of quality that iSoftBet delivers often, so no surprise there.


Thunder Shields slot gives us a fairly long list of features, good enough to keep anyone busy and having fun. I’m not typically a fan of Hold & Win bonus games, but they did add some spice to it, through the extra features that were incorporated.

Thunder Shields Slot Machine FAQ

❓ What is a key options of the Thunder Shields slot?

✔️ Slot developer: iSoftBet , Max. RTP: 96.00% , 5 reels with 40 paylines , Betting Range (€/$): 0.40 - 40 , Max Payout: 4,035x .

❓ Where can I play Thunder Shields?

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❓ Can I play Thunder Shields slot on my phone?

✔️ Yes, it's absolutely mobile-friendly!

❓ Where can I play this slot machine free?

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