Swordquest

Swordquest is a series of action-adventure video games developed and published by Atari, Inc. in the 1980s for the Atari 2600. It was developed as part of a contest, consisting of three finished games, Earthworld, Fireworld and Waterworld (with these titles occasionally appearing on cartridge labels and boxes with capitalized central Ws, e.g. EarthWorld), and a planned fourth game, Airworld.