Tornado Farm Escape
Tornado Farm escape is a 5-reel, 3-row, 20-line video slot featuring Wild substitutions, a Tornado feature and a Storm feature. During normal play all Wild symbols substitute for all symbols except Hot and Cold symbols which are the bonus triggering symbols.
When the reels start spinning, the Storm feature can be randomly triggered and will start from one of the outermost positions on the reels. The Storm moves one position at a time in any direction generating Wild symbols until it moves outside the reels area and disappears.
When a Hot symbol lands on any position on reel 1 and a Cold symbol lands on any position on reel 5 simultaneously, the Tornado feature is activated.
During the Tornado feature the symbol that appears on the second row of the center reel becomes active.
All active symbols and Wild symbols are collected during the Tornado feature and the Tornado feature continues until no more active or Wild symbols appear on the reels.
During the Tornado feature, a meter appears counting all the collected active and Wild symbols wins. Wilds will substitute for the active symbol during the Tornado feature.The Tornado feature ends when a spin does not contain any active or Wild symbols.
and the official blurb from Netent,
Tornado™: Farm Escape is a stormy adventure that will blow you away! Besides Wild Substitutions, this 5-reel, 3-row, 20-line video slot presents two brand new attractions: the Tornado and Storm features.
As funny farm animals are swept away from their rural life on a wild adventure, the Storm feature heaps an abundance of Wilds on the reels. The Tornado feature swirls up symbols to give coins galore with a chance of re-spins, increasing the odds of mega wins that will take players by storm. Get ready for a whirlwind of fun, press the spin button and have a blast!