The Firemen takes place in a big building that's on fire. Your mission is to rescue the people inside and put out the fire. You'll use your watercannon to put out smaller fires, but for bigger flames, you'll need to use your waterbomb. Listen carefully to what your squadmate tells you, or you might end up in trouble.
The gameplay involves navigating through the burning building, fighting fires and rescuing people. You can move around, jump and use your special tools to put out fires. The goal is to complete all the levels and escape the building without getting caught by the flames.