Thunder vs Underworld Free Demo Game

All symbols pay from left to right on adjacent reels, starting with the leftmost reel. The game has two profiles that the player can choose: THUNDER and UNDERWORLD. When playing in THUNDER mode, the chance of hitting FREE SPINS is higher, but the average win in FREE SPINS rounds is lower. When playing in UNDERWORLD mode, the chance of hitting FREE SPINS is lower, but the average win in FREE SPINS rounds is higher.
It is the WILD symbol and substitutes for all symbols except the SCATTER symbol. It appears on all reels.
These are EXPANDING WILD symbols. They appear on all reels. Whenever any of them land in the base game or during FREE SPINS, if a win would occur after the expansion, they expand the entire reel vertically and get a random multiplier. Possible values are 2x, 3x, 4x, 5x, 6x, 7x, 8x, 9x, 10x, 20x, 25x, 50x or 100x. The multiplier applies to all winning combinations of which it is a part. If more than one WILD is part of the same winning combination, their multipliers are added together.
These are the SCATTER symbols. They appear only on reels 1, 3 and 5 and only in the base game. Landing 3 SCATTER symbols triggers the FREE SPINS feature and awards 10 free spins. During this round, any WILD that lands will expand, receive a random multiplier of the same possible values as in the base game, and remain on the screen until the end of the round, during all free spins. The feature cannot be retriggered.
The FREE SPINS wheel can be instantly launched from the base game by purchasing it. The following purchase options are available in THUNDER mode:
15 Lines. All symbols pay from left to right on selected paylines. Any win from free spins is added to the win from the payline. CHO VOLA All wins are multiplied by the bet per line. values are expressed as actual coin wins. Only the highest win per line is paid, regardless of any external multiplier. When winning on multiple paylines, all wins are added to the total win. Any win from the free spin round will be awarded to the player after the round is completed. The total win in the history free spin round includes the entire win of the cycle.