Experience the thrill of Steam 777, the exciting slot game with 4×5 reels and a special bonus game. Spin the reels and watch the steam-powered symbols come to life as you aim for big wins. Don’t miss out on the chance to trigger the thrilling bonus game and increase your chances of hitting the bonus game.
Each round in the base game starts with a grid of five reels of height 4, plus one locked area of height 2.
Every tumble that creates a winning combination will expand the grid by opening up two randomly selected locations in the locked area and revealing the symbol underneath.
The Wild symbols substitute for all symbols except the Bonus Scatter symbol.
If there are 2 Bonus Scatter symbols in the open area once all tumbles have been completed, the Second Chance Scatter will occur.
Expander: The Expander symbol unlocks 3 randomly chosen locations from the locked area.
Booster: The Booster symbol adds its value to all other symbols in the unlocked play area upon landing.
Doubler: The Doubler symbol doubles its value each time the spin counter is reset to 3.