Overview
Developed by a reputable software provider, the "Thunder vs Underworld" casino slot machine is an exciting and immersive game that brings together two contrasting worlds – thunderstorms and dark forces. This 5-reel, 3-row video slot features vibrant graphics, engaging gameplay elements, and rewarding payouts, making it appealing to both new and experienced players.
Theme and Design
The theme of the game revolves around the eternal struggle between light thundervs-underworld.com and darkness. The reels are set against a backdrop of a stormy sky with lightning illuminating the dark clouds. The symbols, including various elemental creatures such as dragons, unicorns, and phoenixes, represent different aspects of nature that are torn apart by the conflict between good and evil.
The game’s design is visually striking, with vibrant colors used to represent the two opposing forces. The dark forces are depicted in a gloomy color scheme, while the thunderstorms are portrayed in bright blues and whites. This contrasting visual style enhances the game’s theme and creates an immersive experience for players.
Symbols
The "Thunder vs Underworld" slot machine features 20 unique symbols divided into three categories: low-paying, high-paying, and special. The low-paying symbols include standard letters A to K, while the high-paying symbols represent various creatures from mythology that are affected by the battle between good and evil.
- Low-Paying Symbols : These standard lettered icons pay out lower amounts for matching combinations of 3-5.
- High-Paying Symbols :
- Dragon (dragon_wing): This dragon symbol, adorned with lightning bolts, serves as a high-paying icon that can award up to x800 the bet amount when landing five on an active line.
- Unicorn (unicorn_head): Representing the mythical creature of purity and magic, this unicorn head pays out up to x500 for a combination of 5 matches.
- Phoenix (phoenix_eyes): The phoenix symbol is associated with rebirth and represents hope amidst chaos. When matching five in an active line, it awards up to x400.
The special symbols in the game include wilds and scatters, which can greatly increase players’ chances of winning rewards.
- Wild Symbol : Represented by a glowing thunderbolt (thunderbolt), this symbol acts as both a substitute for any other icon on the reels and serves as an additional high-paying combination when part of a match. The wild’s value is determined at random after each spin.
- Scatter Symbols :
- Two Underworld-themed symbols: "Key to Death" (key_to_death) and "Sword of Chaos" (sword_of_chaos): These scatters serve as the keys that unlock access to the bonus rounds.
Payouts
The payouts in "Thunder vs Underworld" are based on combinations of matching icons along active paylines. The amounts awarded range from x1 for three matches of a low-paying icon to up to x800 when landing five high-paying dragon wings. Players can configure their bet amount per line, which directly influences the potential payout.
The maximum theoretical return is calculated by multiplying the maximum possible win (x800) times the game’s volatility and RTP values, resulting in an estimated total return of over 97%.
Wilds
Besides its function as a substitute icon, the wild can create winning combinations when participating in matches with other high-paying symbols. The value for each individual combination is determined randomly after each successful match.
When involved in a win combination involving other icons (except scatters), it awards up to x800 of the bet amount per line based on random outcomes.
Scatters
The two Underworld-themed scatter symbols can be combined with specific bonus features:
- Key to Death : This icon must appear three or more times, triggering a free spins round.
- Sword of Chaos : Three matches activate access to the High Risk bonus round (also known as "High Roller").
Bonus Features
The slot offers two distinct and rewarding bonus rounds: the free spins feature with possible re-spins and an additional Wild addition during each spin.
- Free Spins Feature : With three or more scatter Key To Death symbols, this mode is unlocked, granting a minimum of 15 initial spins to play.
- High Risk (or High Roller) Bonus Round :
- This feature can be initiated with the Sword Of Chaos symbol appearing on the third reel in combination with other elements such as wilds and/or scatters present in certain positions during gameplay.
In the "Thunder vs Underworld" slot machine, free spins are determined by random re-spins where extra wilds become more common to form additional winning combinations.