The fourth game in the series. You navigate characters Fireboy and Watergirl through various puzzles. Fireboy can walk in lava, but not in water. Watergirl can walk in water, but not in lava. Turn levers, press buttons, push boxes, and more in a total of 39 levels.

The fourth game in the series. You navigate characters Fireboy and Watergirl through various puzzles. Fireboy can walk in lava, but not in water. Watergirl can walk in water, but not in lava. Turn levers, press buttons, push boxes, and more in a total of 39 levels.