Make sure that water and fire don't touch in the labyrinth of the Forest Temple! In each level you have different goals. There are levels where you have to reach the exit as quickly as possible and grab all the diamonds. In another level, fireboy and watergirl go to look for the the green diamond. And in yet another level it's completely dark, so it's hard to make fireboy and watergirl move safely. Avoid the black oil: it kills both fireboy and watergirl. A game full of nice challenges, that you won't get enough of. Try to beat the highscores!
Click here for a gameplay video of Fireboy and Watergirl 4! Control: Use WAD to move watergirl and the arrow keys to move fireboy.