Thunder vs Underworld

Thunder vs Underworld is a mythological-themed slot by Pragmatic Play that pits deities of the sky against those of the underworld. The game features a 5×5 grid set against a fiery backdrop, with symbols representing both realms. The to be Zeus and Hades figures, accompanied by mythical creatures such as phoenixes and griffins.

Core Game and Mechanics

The base game utilizes a 5×5 grid with 15 paylines. Winning combinations are formed from left to right on adjacent reels. The game offers two distinct modes – Thunder and Underworld – each affecting the volatility and potential payouts.

Thunder mode provides higher volatility with a chance for bigger wins but lower average payouts during free spins. Conversely, Underworld mode offers lower volatility with more consistent but potentially smaller wins during the bonus rounds.

A key mechanic is the expanding Wild symbol, which can appear on all reels. When part of a winning combination, it expands to cover the entire reel and applies a random multiplier ranging from 2x to 100x.

Bonus Features

Free Spins

• Triggered by landing 3 Scatter symbols (temple icons) on reels 1, 3, and 5.
• Awards 10 free spins initially.
• During free spins, any expanding Wild that lands receives a random multiplier and remains sticky for the duration of the feature.
• The feature cannot be retriggered.

Buy Free Spins

• Players can instantly access the Free Spins feature by paying a premium.
• In Thunder mode, players can buy regular Free Spins for 75x the total bet or special Free Spins for 300x the total bet.
• In Underworld mode, regular Free Spins cost 150x the total bet, while special Free Spins cost 300x the total bet.
• Special Free Spins guarantee an expanding Wild with a random multiplier on the first spin.

Volatility Choice

• Before gameplay, players can choose between Thunder (high volatility) and Underworld (lower volatility) modes.
• This choice affects the frequency and size of potential wins, particularly during the Free Spins feature.

Max Win Cap

• The maximum win is capped at 15,000x the total bet.
• If this limit is reached during Free Spins, the round ends immediately, and the win is awarded.

The most intriguing aspect of Thunder vs Underworld is its dual-mode system, allowing players to choose their preferred volatility. This feature, combined with the expanding Wilds and multipliers, creates a highly dynamic gameplay experience where strategy and risk tolerance play significant roles. The ability to buy into the Free Spins feature with different options for each mode adds another layer of strategic depth, catering to various player preferences and bankroll management styles.