Blue Planet (1997)

From the back of the book:

2199AD
Welcome to Poseidon

The planet . . .
A waterworld, home to a savage ecology and awash in the mystery of an ancient alien past.

The human race . . .
Desperate and dying on a famine-ravaged Earth, reaches hungrily for the once forgotten colony world and its promise of ultimate survival.

The Long John . . .
Hidden below the ocean floor, a priceless, enigmatic ore that holds the key to human DNA and the promise of human immortality.

The colony . . .
Transformed into a lawless frontier as mining corporations wage brutal war and colonists fight for the survival of their adopted world.

The aborigines . . .
Inscrutable, powerful, and enraged in defense of a primal heritage as ancient and mysterious as the planet's darkest waters.

The game . . .
A compelling journey into humanity's dark future on a distant planet where life is hard and dying is easy. A world where GEO Marshals enforce the peace and wired mercs patrol deep waters in deadly fighter subs. A place where corporate greed and human desperation ravage an alien ecology, threatening to plunge humanity into a war of survival with an ancient legacy.