Return to player
96.2%
Min bet size
0.10
Game type
Video Slots
Variance
High
Reels
6
Progressive Jackpot
No
Popularity
Max bet size
100
Game provider
Thunderkick Gaming
Bonus Features
Yes
Paylines
50
Theme
Battle
Second Thunder online slot game
Second Thunder is a video slot developed by Thunderkick. The game features a dark fantasy theme set within a winter battlefield environment, characterised by snow-covered terrain, armoured knights, and a conflict-driven visual presentation.
cFrom a gameplay perspective, Second Thunder uses a high-volatility math model and offers a maximum win potential of up to 12,500x the bet, positioning it toward players who prefer higher-risk slots with strong thematic focus. This review takes a closer look at how the game’s features and mechanics come together and how they influence the overall gameplay experience.
Theme, Visuals, and Gritty Battle Mechanics Explained
The aesthetic of Second Thunder is one of its strongest assets; it looks like an oil painting brought to life with moving graphics. Behind the 6x5 grid, an army in heavy knight armor marches with their backs to us, clutching spears as raindrops fall over the scene. The sound design further enhances this chilling tension, providing an immersive layer to the desolate, frozen battlefield.
The pay symbols are rendered in crisp, metallic detail:
- Low-Paying Symbols: Battle-worn helmets, halberds, horns, and shields, paying up to 0.8x for a 6-of-a-kind hit.
- High-Paying Symbols: Mythological and predatory icons, including eagles, snakes, boars, wolves, and Viking-looking warriors, reward you with up to 10x for six matching symbols.
- Wild Symbol: A crackling thunderbolt that substitutes for all symbols except the Scatter.
*The symbol payout chart shown below is calculated based on a $1.00 bet.
| Symbol | 6x Match | 5x Match | 4x Match | 3x Match |
|---|---|---|---|---|
 | 10x | - | - | - |
 | 10x | 5x | 2x | 1x |
 | 2x | 1.5x | 1x | 0.5x |
 | 1.6x | 1.2x | 0.8x | 0.5x |
 | 1.5x | 1x | 0.8x | 0.4x |
 | 1.4x | 1x | 0.7x | 0.4x |
 | 0.8x | 0.6x | 0.4x | 0.2x |
 | 0.8x | 0.6x | 0.4x | 0.2x |
 | 0.6x | 0.5x | 0.3x | 0.1x |
 | 0.6x | 0.5x | 0.3x | 0.1x |
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Key Features: Forge Wild Fields and the Strategic Feature Row
The gameplay in Second Thunder is defined by two innovative mechanics that can turn a calm snowfall into a full-blown thunderstorm in seconds.
- Wild Field Feature: This is arguably the game's standout mechanic. Landing two or more Wilds on different reels activates a rectangle that transforms every symbol within its borders into Wilds. We found this creates explosive win potential, especially when these fields cover large portions of the grid.
- Feature Row: Located directly above the main reels, this extra line can trigger randomly to rain down Scatters, Wilds, or multipliers up to 10x. Crucially, multipliers on the Feature Row are additive, meaning they combine their values to boost any win on the reel directly beneath them.
Bonus Game: Harnessing Persistent Multipliers
Triggering the Bonus Game requires landing 3 or more crackling Scatters anywhere on the reels. You start with 5 Free Spins, plus 2 additional spins for every extra Scatter beyond the initial three.
The intensity ramps up here because the Feature Row remains active on every single spin during the bonus round. This means the potential for Wild Fields and additive multipliers is significantly higher than in the base game. We also appreciated the generous retriggers, where landing 3 Scatters during the feature awards an extra 5 spins.
Maximize Your Battle Wins: Feature Buy (Bet+) Strategy
Given the high volatility and "predictable" nature of the base game, we found in our testing rounds that leveraging the Feature Buy (Bet+) options is key to strategic play.
- Presence of Thor (15x bet): Guarantees an active Feature Row on the initial spin.
- Thunderstorm (15x bet): Guarantees a Wild Field on the initial spin.
- Direct Bonus Access (75x bet): For those who prefer to skip the warm-up, you can buy straight into the Bonus Game. While this is a steep direct buy, it puts you immediately into the most rewarding part of the slot.
In our tests of the game, we observed that the Presence of Thor and Thunderstorm Feature Buys did not give us big wins unless we used them for more than 15 rounds. This makes these features costly with relatively low returns.
The Direct Bonus Access, on the other hand, despite its very high cost, was by far the most consistently reliable feature, giving us very big wins of up to 450x the base bet. Its high cost makes it mainly suitable for risk-taking high rollers.
Best Second Thunder Alternatives - Top Similar Slot Games to Try
- Gates of Olympus 1000 from Pragmatic Play is an upgraded version of the popular Gates of Olympus slot. This high-volatility game features the Pay Anywhere system, an RTP of 96.50%, and Zeus as the central character. With increased volatility, a higher RTP, and triple the maximum win potential, this updated version delivers an enhanced gameplay experience while staying true to the original.
- Gates of Hades, also from Pragmatic Play, brings players into the world of Greek mythology with a fresh twist on the series. Featuring a Cluster Pays mechanism, Free Spins, and Wild Multipliers, the slot offers high volatility and an RTP of up to 96.52%. Players can aim for a maximum win of 10,000x their stake, making this a thrilling addition to the myth-themed slot lineup.
Final Verdict: Is Second Thunder Worth the High Volatility Risk?
Second Thunder combines a dark, atmospheric presentation with a feature set built around higher volatility and layered mechanics. While its RTP sits below the wider market average, the interaction between the Wild Fields and Feature Row helps maintain gameplay momentum once features are active.
The slot avoids lighter or casual themes, instead focusing on a more intense and unpredictable experience. As a result, Second Thunder is likely to appeal to players who prioritise high volatility, complex feature interaction, and larger win ceilings over consistency or frequent payouts.
James is a casino games expert on the Playcasino.com editorial team. With many years of professional experience at a leading casino game development company and a passion for playing casino games, James has become a true expert in slots, blackjack, roulette, baccarat, and other games.
James uses this expertise to provide reliable, insider advice through his reviews and guides, breaking down the game rules and offering tips to help you win more often. Rely on James's extensive experience for expert advice on your casino play.
