Atol is a water world with a heavy atmosphere and continuous rain. The water is acidic and contains no life, and the planet has no stable land mass above sea level. There is a large moon, however, which combines with the system’s sun to create huge tides that sweep the planet. It is impossible to build communities on the land areas that are exposed, because they are above water for only a few hours at a time. The seas are so violent that no attempt has been made to build floating structures. The atmosphere is breathable with a filter mask, however, and research continues into how to tame this world. A spacestation orbits Atol, carrying a few dozen permanent staff, and two or three survey teams go down into the atmosphere every month.Aliens Adventure Game (1991), Leading Edge Games.