This is our own slot rating based on how popular the slot is, RTP (Return To Player) and Big Win potential.
Play the Second Thunder free demo slot—no download required! Try Thunderkick’s latest game, enjoy risk-free gameplay, explore features, and learn game strategies while playing responsibly. Read our expert Second Thunder slot review with ratings for key insights before you play.
Released:February 25 2026
Responsible Gaming
You have to be 18 years or older to play our demo games. Please confirm that you are of the legal age to proceed:
MORE THUNDERKICK CASINOS
Anjouan-License
Costa Rica-License
Curacao-License
There is a No Deposit Bonus available: 50 Free Spins
Curacao-License
Curacao-License
There is a No Deposit Bonus available: 15 Free Spins
Curacao-License
Curacao-License
There is a No Deposit Bonus available: 30 Free Spins
Curacao-License
Curacao-License
There is a No Deposit Bonus available: 100 Free Spins
Curacao-License
There is a No Deposit Bonus available: 50 Free Spins
Curacao-License
There is a No Deposit Bonus available:
50 Free Spins
Malta-License (EU)
Costa Rica-License
There is a No Deposit Bonus available: 25 Free Spins
Second Thunder is a video slot game created by the provider Thunderkick. In this Second Thunder slot review you’ll learn about its core features (including RTP, max win, and volatility), the bonus mechanics, and what helps the game stand out — along with the areas where it may fall short.
Second Thunder is played on a 6 reel layout with up to 50 paylines/ways. The game includes a variety of features such as Bonus Bet, Buy Feature, Extra Wilds, Reel Multiplier, Stacked Symbols, Wilds, and more. There’s also a dedicated free spins bonus round, which is typically where the game’s biggest win potential comes into play.
The standard RTP (Return to Player) for Second Thunder slot is 94.2% (Could be lower on some sites). This payback is rather low and considered to be below average for an online slot. Theoretically, this means that for every €100 put into the game, the expected payout would be €94.2. However, the RTP is calculated on millions of spins, which means that the output for each spin is always random.
The highest possible payout for this slot is 12500x your total bet which is very high and gives you the chance to win really big wins. The maximum possible win is also calculated over a huge amount of spins, often one billion spins.
Second Thunder is a volatile slot, and Thunderkick rates the volatility High (4/5). Volatility, in the context of slot games, refers to how often and how much a slot game pays out. Second Thunder is designed to appeal to players who enjoy the adrenaline rush of substantial winnings that low volatility slots can't deliver, making it a great fit for fans of high volatility slots who are willing to accept the inherent risks of less frequent payouts.
Second Thunder was released on February 25 2026.
This is our own slot rating based on how popular the slot is, RTP (Return To Player) and Big Win potential.
Yes! You can enjoy Second Thunder in demo mode without signing up. Try our free version above to explore the features. For real money play, visit one of our recommended Thunderkick casinos.
To play for real money:
Yes! Second Thunder includes a Bonus Buy option in supported regions, allowing players to purchase direct entry into features without waiting for natural triggers.
Yes. Second Thunder is powered by Thunderkick, a licensed provider that uses certified RNG (Random Number Generator) technology to ensure fair and unpredictable outcomes.
Yes! Second Thunder is classified as a high volatility slot, meaning wins occur less frequently but have the potential to be significantly larger when they do land. This creates a high-risk, high-reward experience best suited for players who enjoy intense swings and long-term progression.
The slot offers a big max win of 12500x your stake.
Example: A €1 bet could return up to a solid €12500.
Yes! Most of our featured Thunderkick casinos on this page offer welcome packages that include free spins or bonus cash usable on Second Thunder. Always check the terms before claiming.
Absolutely. The game is fully optimized for mobile devices, including iOS and Android.
Yes, many crypto‑friendly casinos offer Second Thunder as long as they support games from Thunderkick. You can usually play using popular cryptocurrencies like Bitcoin, Ethereum, or Litecoin. If you prefer crypto gaming, check out our list of trusted Bitcoin casinos to find platforms that accept digital currencies and feature Thunderkick slots.
Yes, the demo mirrors the full version in gameplay, features, and visuals—just without real money payouts.
