Steam Tower is a 15 line slot game by NetEnt that uses a steam punk, industrial theme.
The game uses stacked wilds and normal wild symbols during normal spins.
When you get one or more fully stacked wilds you will trigger the free spins feature.
10 free spins are awarded with a 2 times multiplier. Every wild symbol appearing will add two more free spins and will let your character climb a floor. When you reach certain floors the multiplier increased up to a maximum of 7. If you reach the top floor, floor 17, you will also be awarded with an added cash bonus.
Steam Tower looks very nice and comes with a unique free spins bonus. The free spins trigger rather easily, but getting high multipliers or even reaching the top floor is hard.