This is our own slot rating based on how popular the slot is, RTP (Return To Player) and Big Win potential.
Play the Thunder vs Underworld free demo slot—no download required! Try Pragmatic Play’s latest game, enjoy risk-free gameplay, explore features, and learn game strategies while playing responsibly. Read our expert Thunder vs Underworld slot review with ratings for key insights before you play.
Released:May 21 2025
Responsible Gaming
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Thunder vs Underworld by Pragmatic Play brings mythological warfare to the reels, featuring Zeus vs Hades-style action with expanding wilds, multipliers, and free spins. Players can choose between Thunder Mode for frequent wins or Underworld Mode for higher payouts. With a 98% RTP and a massive 15,000x max win, this high-volatility slot delivers intense gameplay and stunning visuals. Will you harness the power of thunder or embrace the darkness of the underworld?
Thunder vs Underworld has a layout that consists of 5 reels and up to 15 paylines / ways. The game has several features including Buy Feature, Enhanced RTP, Expanding Wilds, Multiplier Wilds, Random Multiplier, Super Free Spins, and more. Thunder vs Underworld also has a free spins bonus round and this is usually where you can win the big money.
The standard RTP (Return to Player) for Thunder vs Underworld slot is 98% (Could be lower on some sites). This payback considered very good and higher than average for an online slot. Theoretically, this means that for every €100 put into the game, the expected payout would be €98. 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 15000x 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.
Thunder vs Underworld is a volatile slot, and Pragmatic Play rates the volatility Very High (5/5). Volatility, in the context of slot games, refers to how often and how much a slot game pays out. Thunder vs Underworld is designed to appeal to those who enjoy the adrenaline rush of substantial winnings that low volatility slots can't deliver, and are willing to accept the inherent risks of less frequent payouts.
Thunder vs Underworld was released on May 21 2025.
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 Thunder vs Underworld in demo mode without signing up. Try our free version above to explore the features. For real money play, visit one of our recommended Pragmatic Play casinos.
To play for real money:
The slot offers a big max win of 15000x your stake.
Example: A €1 bet could return up to a solid €15000.
Yes! Most of our featured Pragmatic Play casinos on this page offer welcome packages that include free spins or bonus cash usable on Thunder vs Underworld. Always check the terms before claiming.
Absolutely. The game is fully optimized for mobile devices, including iOS and Android.
Yes, the demo mirrors the full version in gameplay, features, and visuals—just without real money payouts.
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