X3 - Reunion begins in 2935. The Argon fleet is stretched almost to breaking point by the continuing attacks from the aggressive Khaak, while ruthless Yaki pirates hunt for a mysterious relic, and an equally mysterious machine, obviously left behind by an ancient species, poses a whole new set of questions...

X3 - Terran Conflict creates a bridge back to Earth's solar system. The player gets to take on the roles of various characters from the X universe, or a Terran military pilot, and set out on numerous adventures in the most extensive world of all X games ever. X³: Terran Conflict 2.0 raises questions such as: how has Earth changed in the course of all those years? How are the relationships between Earth and its brethren from the X universe going to develop?

The new add-on, The Aldrin Missions, features the colony of Aldrin, which was lost centuries ago, and is now once again joining the Terran system. The Terrans are quite eager to reestablish the connections between Aldrin, separated from the rest of the universe for so long, and Earth. The Terrans are putting a huge effort into recolonizing the system that had been presumed lost for so long. The player takes on a crucial role in shaping this new Terran frontier, while exploring new Terran stations and facilities, and making use of a new ship and numerous additional features.