The wild is the ultimate symbol in this slot game; it replaces any symbol on the reels as well as ascend you one more floor, effectively increasing your multiplier.
Wild and Stacked Wild feature
A wild during the base game simply replaces all symbols in the game with no exceptions. If you get a stacked wild but it’s not covering the whole reel, it simply gives you some nice extra wins. However, if the stacked wild covers the whole reel, you’re rewarded with 10 Free Spins.
Steam Tower Free Spins feature
Don’t worry if patience isn’t one of your strong suits, the Free Spins feature happens quite often in the game. Simply get a stacked wild covering a whole reel and you can start climbing your way to the top of the tower. A wild in the bonus game gives you 2 additional Free Spins as well as letting you climb up one level. A multiplier starts of at level 2 and increases on every third level, all the way up to a 7x multiplier on the 16th floor.