Island Survival 4 is a fan-made spin-off of the classic Fireboy and Watergirl puzzle platformer. This time the pair are stranded on a deserted island and have to work their way through its forest together. It keeps the rule that made the original series famous, and adds softer, more colourful graphics along with a new set of jungle hazards.
You control two characters, either alone or with a friend on the same keyboard. Fireboy and Watergirl must each stay away from the opposite element. Fireboy is destroyed by water, and Watergirl is destroyed by fire. If either of them is lost, the level starts again. Along the way you collect diamonds and help each other past obstacles, and both characters have to make it to the end of the stage. The island adds its own dangers on top of the elements: jumping frogs, barbed wire and man-eating flowers that snap at anyone who gets too close.