This feature is activated randomly and can result in two or more reels being covered with mystery stacks, and one symbol replacing the entire stack on one reel. It is possible for up to three different symbols to appear in the mystery stacks, but the first two reels will always be occupied by the same symbol. If the first two reels are stacked, a respin is triggered, with the stacked reels locked in their position. If the adjacent reel also appears stacked after the respin, the respin feature will carry on.
Free spins are awarded when three or more stacks of scatters land on adjacent reels, starting from the left-hand side. Three, four and five stacks will get you 5, 10 and 15 free spins respectively. During this feature Mystery Stacks and respins also come into play, but here all stacks will be covered by one symbol for bigger wins. Regrettably, free spins cannot be re-triggered.
All-in-all Showdown Saloon is a pretty decent slot, and Microgaming has done just enough in terms of graphics, soundtrack, and features to keep you entertained and hopefully pocket up to 1500x your bet during the free spins rounds. The high-variance game comes with a RTP of 96.15%