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Written by: Filip Gromovic Reviewed by: Nashon Khamala
Updated: Jun 2026
Punters who play demo Thunderkick slots will sooner than later want to spin with real money. Since its founding in 2012, the Stockholm-based studio has carved a unique niche in bringing quirky themes to life using strong visuals and memorable sounds. All popular Thunderkick slots — from Esqueleto Explosivo to Pink Elephants and the Beat the Beast series — are made with attention to detail. Here is a deep dive into Thunderkick history, their signature features, and how to play free Thunderkick slots.
| Founded | 2012 |
| Headquarters | Stockholm, Sweden |
| CEO | Jan Lunde |
| Number of Games | 99 |
| Game categories | Slots |
| RTP range | 94%–98.6% |
| Licenses | MGA, UKGC |
| Notable slots | Esqueleto Explosivo, Pink Elephants, Beat the Beast series |
Thunderkick was founded in 2012 in Stockholm, Sweden, with Jan Lunde as CEO. The studio holds licenses from the Malta Gaming Authority (MGA) and the UK Gambling Commission (UKGC). Remaining independent has allowed Thunderkick to maintain full creative control and game quality.
The studio is known for its quirky themes, bold visual identity, cluster pays mechanics, and long-running franchises like Esqueleto Explosivo and Pink Elephants. As of May 2026, the library has grown to 99 titles, with Hammer Blaze launching May 27. An executive shake-up in 2024 saw the appointment of Svante Sahlström as CCO, and in 2026 the studio signed a deal with PointsBet to enter the Ontario market.
A constantly updated list of the great American online casinos that have Thunderkick casino slots. This casinos are sorted based on our rating and quality of their
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Thunderkick was founded in 2012 with Jan Lunde as CEO and the drive to shake things up in the iGaming industry with creativity and passion. The Stockholm-based studio started with a vision of going against the grain — creating content that stands apart from what other developers have flooded the market with.
Over a period of thirteen years, the company grew from a small team to over 80 people across different fields. It expanded to Malta, where it operates an additional office. An executive shake-up in 2024 saw the appointment of Svante Sahlström as CCO in preparation for expansion into Ontario, which was actualized through a deal with PointsBet in 2026.
Thunderkick is a two-time recipient of the Videoslots Awards — in 2017 for Frog Grog (Best Low Volatility Game of the Year) and in 2019 for Flame Buster (Best Mobile Game of the Year). The studio’s title Flamebuster also won Best Mobile Game at the EGR Awards in 2017.
Other accolades include the Best New Slots Provider at the CasinoMeister Awards in 2018, Innovation in RNG Casino Software at the EGR B2B Awards in 2017, and Slot Provider of the Year at the International Gaming Awards in 2021. The studio received a Game Design & Art Direction nomination at CasinoBeats Game Developer Awards in 2024.
Thunderkick mobile slots are designed for punters who want to take their gameplay wherever they go. The developer uses HTML5 technology to create their portfolio, which allows titles to adapt to different screen sizes. Since the games are web-based, a strong internet connection is recommended for the smoothest experience.
The strong mobile optimization efforts not only make titles stand out visually, but also earn industry recognition — from Best Mobile Game of the Year in 2017 to Best in Innovation in Mobile in 2020. All new releases are designed mobile-first from day one.
Keeping up with the studio's rapidly growing library is not an easy task. Players who recently discovered the provider and are unsure of the top titles can try the following Thunderkick demo titles to see if their interests align with the studio's style.
Dance with the bony remains of Enrico Mortis and his mariachi band. Features dropping symbols, Mucho Multipliers that grow up to 64x on consecutive wins, explosive wilds, free spins, and a buy feature. One of the studio's most celebrated titles that spawned a direct sequel.
Tribal minions search for the magical peanut that awakens the pink elephant. Features mystery scatter, a bonus game with free spins, symbol transformation, and retriggers on 6 reels. The sequel adds a buy feature and raises the ceiling to 10,000x, making this one of the franchise's most rewarding entries.
Face off with different monsters — from Kraken to Grim Hellhound and Griffin. Each entry in the series features stacked wilds, free spins, and retriggers. Griffin's Gold holds the highest maximum win of any Thunderkick title at 22,222x your bet, making the series the studio's ceiling champion.
Themed around the mythical great Asian Tiger, this release features expanding wilds, bonus spins, and expanding reels to maximize winning odds. One of the studio's stronger mid-range titles with an above-average RTP and a solid maximum payout ceiling for a non-progressive slot.
Follow Gemma across different terrains in this multi-entry series. Features infinite multipliers, avalanche mechanics, wild explosions, and a mystery feature that adds surprise elements throughout play. The series reaches a maximum win of 15,000x across entries, with RTPs between 96.14% and 96.17%.
Instead of rolling reels, this title has birds landing on high-voltage lines. Features dropping symbols, high voltage multipliers, the Inwinity Spin mechanic, and a bonus game with free spins. A strong 9,000x ceiling and 96.1% RTP make it one of the more complete packages in the Thunderkick catalogue.
This boutique online casino software provider ranks as one of the game developers with titles geared towards improving players' experience. As of May 2026, the library has grown to 99 titles. Though this is not huge by industry ratings, the catalogue prioritizes quality: each release is accentuated by diverse themes and a memorable gameplay experience.
| Quality over quantity | They prioritize quality titles over having hundreds that don't make the desired impression. This is why any of the releases is accentuated by diverse themes and a memorable gameplay experience. |
| Incentive features | These games also have a plethora of attributes ranging from sticky respins, cascading reels and multipliers — including the signature Mucho Multiplier found in the Esqueleto Explosivo series. |
| Game distribution | The massive distribution network is one of the reasons why Thunderkick slots are available in many places. Partners include Casino Barcelona, Betclic, Bally's, Bet365, Entain, William Hill, and LeoVegas. |
Here are some of the standout titles you can find in the catalogue:
This is a retro title with an arcade style that allows players to get an immersive gameplay experience. It also offers freebies ranging from retriggerable spins and mystery symbols.
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This ranks as one of the highest-paying Thunderkick slots with an industry-leading 98.6% RTP, making it the top entry by return rate in the entire catalogue. It features low volatility, a classic 5-reel structure with 25 active pay lines, expanding wilds, and free spins.
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Also called Pink Elephants 2 – Reborn, it's an adventure-themed video slot that takes players on a mystical journey. The sequel to the original features Connecting Pay Ways, high variance, 96.13% RTP, and a maximum win ceiling of 10,000x — an increase over the original's 8,200x.
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The original Pink Elephant takes tribal minions on a journey to trigger the Magical Peanut that wakes the elephants from their slumber. Features high volatility, up to 96% RTP, 8,200x maximum exposure, 6 reels, and a bonus game with retriggers, free spins, and transformed symbols.
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Some Thunderkick casino games pay more than others, and though the differences may not always be vast, they are significant. The studio's RTP range of 94% to 96.7% means the best-returning titles are still well above the industry floor. Beat the Beast: Griffin's Gold has the highest maximum win of 22,222x — the highest payout rate of any Thunderkick title.
This shares the themes of mystery, myth and adventure. The plot goes along the lines of navigating the nooks and crannies of the castle, searching for treasures hidden in mystery symbols. Those who get around the bloodcurdling saga and the high volatility can get access to wagers through the 5 reels with 25 active paylines. It has an RTP of 96.07%.
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This title easily makes it to the top paying Thunderkick slots list for reasons ranging from over 98.6% RTP, and longer sessions with potential for steady wins. It also has attributes like expanding wilds and free spins. The highest-returning title in the entire Thunderkick catalogue.
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New players may want to take a spin at this. What's more? It has that vintage charm to keep you invested, high visual graphics and 40 active paying lines.
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The studio has introduced some innovative bonus features that add excitement to every gameplay. Several of these have become recognized signatures of the Thunderkick brand:
Expressive and colorful graphics and animations are some of the features that set titles from this provider apart from the competition. Each release has a distinct visual language — from the skeletons of Esqueleto Explosivo to the tribal world of Pink Elephants — that makes the games immediately recognizable.
One of the Thunderkick slot features that swaps the payline cashout system for cluster pays, making winning feel more organic. Land six or more of the same symbols anywhere on the grid to win, removing the need to track specific paylines during play.
Featured in the Esqueleto Explosivo series, this mechanic grows the multiplier with every consecutive win — up to 64x. Land three or more scatter symbols to get free spins with unique progressive multipliers, which increase your potential for big wins the longer the bonus runs.
Based on player feedback and industry reviews, here are the main benefits of playing Thunderkick casino games.
Still in commitment to the goal of leading the industry with innovation, Thunderkick has introduced new mechanics different from what exists elsewhere. On top of this are the high volatility free spins and cascading avalanche reels. The studio also experiments with a gridless reel structure — removing paylines and reels entirely on specific titles like Fruit Wrap. Players can also get double offers, such as cascading reels and multiplying wins in one fell swoop.
With fewer than 100 titles, Thunderkick opts to give the best of different worlds. The portfolio has a mix of medium, low and high volatility slots — with RTP ranging from 94% to 98.6%. Players with different experience levels, bankroll values and playing strategies can find one or two Thunderkick slots that suit their preferences.
Thunderkick slots are widely available thanks to a growing list of aggregator platforms and online casinos helping publish the games. Partners include Casino Barcelona, Betclic, Bally's, Bet365, Entain, William Hill, and LeoVegas — and the 2026 deal with PointsBet opens the Ontario market.
Filip Gromovic is a senior slots reviewer here at FreeSlots99 with over five years of experience evaluating the latest drops in the world of iGaming.
Being a slot fan himself, Filip approaches slot ratings just the way we like it – professionally, but also from a player’s standpoint.
That enables him to give his unbiased take on the slot’s features, gameplay and design, while only recommending top-tier releases to our readers.
More info on Filip Gromovic
Having served FreeSlots99 for more than 5 years as a senior content editor and reviewer, Nashon Khamala has extensive knowledge in game slots and iGaming.
His membership in the Editorial Freelancers Association helps him deliver content that reaches both editorial excellence standards and an engaging information level.
By using his expertise in slots games combined with player-focused analysis, Nashon delivers a professional evaluation of slot features and player experiences in his reviews.
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