The Wild Worlds video slot from Netent has 5 reels and a 5-row Avalanche with Hero Wilds, a random Destroy Feature, and Free Spins that have their own Wild features. Wild Worlds is played with 1-10 bet levels (20 coins per level) and different coin values. Symbols in winning combinations explode and disappear, leaving space for a second Avalanche of symbols for a chance of bigger wins.
There are 2 types of Monsters in the game: 3 Captains and the Boss. Each of the Captains has 15 health points. When a Monster has 0 health points it is destroyed. Monsters that are partially damaged do not reset in between Free Spins. For each Captain that is destroyed, the Free Spin feature of the current Free Spins world is activated.
If multiple Captains are destroyed at the same time, the feature is awarded the corresponding number of times. This feature is activated after the next Avalanche™, before wins are calculated.
The Boss has 105 health points. He can only be damaged, if all Captains have been destroyed. The Boss has 5 weak spots; 2 of them are worth 15, and 3 of them – 25 health points.
When attacking the Boss, Heroes make attacks against its separate weak spots. If the Boss is destroyed, the current Avalanche™ will continue until there are no more wins, and the player will then be transferred into another Free Spins world, regardless of the remaining Free Spins. In the new world, the player will receive 8 Free Spins, and a new set of Monsters.
If the Boss in the new Free Spins world has been destroyed as well, the player then moves to the next Free Spins world. The worlds change in turn (if for example, the first was the Ice World, the next will be Fire Lands and then Dark Forest). The same world can be activated twice, if the player has defeated the Boss in the previous 2 worlds. This continues as long as the new Boss in the new world is defeated.
When all Hero symbols in a winning combination have been destroyed, the remaining symbols of this type that are present on the reels, will turn into Wild symbols. This happens before the next Avalanche™ starts and continues until there are no more wins on the Hero symbols. All Hero symbols are Medium win symbols. Wild symbols substitute for all symbols except Scatter symbols.
Wild symbols will substitute for the highest paying symbol according to the Paytable. If 3 or more Wild symbols are adjacent vertically or horizontally, they award a win on their own in addition to the symbols on either side. The Hero Wilds feature can be activated in both main game and Free Spins. Destroy Feature is activated randomly in case of a no-win situation in the main game.
In this feature, symbols of only one color remain on the reels, all of the other symbols are destroyed. New symbols fall then on the reels with the new Avalanche™. Scatter symbols cannot be destroyed.