About the Game
All symbols in Pragmatic Play’s Thunder vs Underworld 250 pay from left to right on adjacent reels, starting from the leftmost reel. The game features two modes that the player can choose from: THUNDER and UNDERWORLD. The game’s appearance changes depending on the selected mode. In THUNDER mode, the chance of triggering the Free Spins feature is higher, but the average win during Free Spins rounds is lower. In UNDERWORLD mode, the chance of triggering the Free Spins feature is lower, but the average win during Free Spins rounds is higher.
Max Win
The theoretical RTP of the game is 98.01% when the THUNDER mode is selected.
The theoretical RTP of the game is 98.01% when the UNDERWORLD mode is selected.
The maximum win in Thunder vs Underworld 250 is capped at 25,000x the bet amount in both the base game and the free spins round. If the total winnings in the FREE SPINS ROUND reach 25,000x the bet amount, the round ends immediately, the winnings are awarded, and any remaining free spins are forfeited.
Game Rules
This is the Wild symbol, and it substitutes for all symbols except the Scatter symbol.
It appears on all reels.
Expanding Wild symbols with a multiplier
These are EXPANDING WILD symbols. They appear on all reels.
When one lands during the base game or Free Spins and contributes to a win, it expands vertically to cover the entire reel and is assigned a random multiplier. Possible values are: 2x, 3x, 4x, 5x, 6x, 7x, 8x, 9x, 10x, 20x, 25x, 50x, 100x, or 250x.
The multiplier applies to all winning combinations that include the symbol. If multiple WILD symbols are part of a winning combination, their multipliers are added together.
Free Spins
These are SCATTER symbols. They appear only on reels 1, 3, and 5, and only during the base game.
Land 3 SCATTER symbols to trigger the FREE SPINS feature and receive 10 free spins.
During the round, any expanding WILD symbol expands, receives a random multiplier from the same set of possible values as in the base game, and remains on the screen for the duration of the free spins.
The bonus round cannot be retriggered.
Special reels are used during play.
Buy Bonus
The FREE SPINS feature can be instantly triggered in the base game by purchasing it.
The following purchase options are available in THUNDER mode:
Pay 75x your total bet to trigger the standard Free Spins feature.
The game’s RTP when using the “Buy Free Spins” option in Thunder Mode is 98.02%. For 300x your bet, you get the special Super Free Spins 1 feature, which guarantees an expanding Wild with a random multiplier in a random position during the round’s first free spin.
The game’s RTP when using the “BUY SUPER FREE SPINS 1” option in OLYMPUS mode is 98.03%.
For 1750x the bet amount, you receive the SUPER FREE SPINS 2 special feature, in which an expanding WILD with a 100x multiplier is guaranteed to land in a random position during the round’s first free spin.
The game’s RTP when using the “BUY SUPER FREE SPINS 2” option in OLYMPUS mode is 98.01%.
The following purchase options are available in UNDERWORLD mode:
Pay 150x the total bet to trigger the standard FREE SPINS feature.
The game RTP when using the “BUY FREE SPINS” option in UNDERWORLD mode is 98.03%. For 300x the bet, you get the special SUPER FREE SPINS 1 feature, where one expanding WILD is guaranteed to land with a random multiplier at a random position during the round’s first free spin.
The game RTP when using the “BUY SUPER FREE SPINS 1” option in UNDERWORLD mode is 98.01%.
For 3500x the bet, you get the special SUPER FREE SPINS 2 feature, where one expanding WILD is guaranteed to land with a 250x multiplier at a random position during the round’s first free spin.
The game RTP when using the “BUY SUPER FREE SPINS 2” option in UNDERWORLD mode is 98.01%.
Special Bet
In the THUNDER and UNDERWORLD profiles, the player can select a bet multiplier. The game behaves differently depending on the selected bet. Possible values:
10x bet multiplier – Standard game
SUPERSPIN 1 – 100x bet multiplier. When SUPERSPIN 1 is active, a WILD symbol with a random multiplier is guaranteed to land in a random position on the screen during every spin and expands if there is at least one winning combination.
The theoretical RTP of this game in THUNDER mode with SUPERSPIN 1 active is 98.04%.
The theoretical RTP of this game in UNDERWORLD mode with SUPERSPIN 1 active is 98.04%.
SUPERSPIN 2 – 3000x bet multiplier. When SUPERSPIN 2 is active, a WILD symbol with a guaranteed 250x multiplier is guaranteed to land in a random position on the screen during every spin and expands if there is at least one winning combination.
The theoretical RTP of this game in THUNDER mode with SUPERSPIN 2 active is 98.02%.
The theoretical RTP of this game in UNDERWORLD mode with SUPERSPIN 2 active is 98.02%.
Pros & Cons
Pros
- Buy Free Spins
- Extremally high evaluated – 7.1
- Design is fine
- Max Win – x25000.00
- The slot was commended for his quality
- €/$0.10 per spin is a starting bet in the Thunder vs Underworld 250
- Basic standard of RTP
