Nectaris

In the year 2104, the Solar Union (the government of Earth and the solar system) faces trouble from three former colonies. Under the guise of negotiations, the colonies' forces attack and capture three mining worlds: Neptune's moon Triton, the Earth-like planet Romulous and the water world Pacifica. Earth's survival is at stake. It is the player's mission to strike back at the invaders and recapture the three worlds. Earth's full arsenal of ground, air and naval forces is standing by.