The collector's edition contains both X³ games, including all add-ons. The new add-on "The Aldrin Missions" for X³: Terran Conflict is released for the first time, offering numerous additional missions, ships, and sectors. The X³: Gold Edition represents the grand finale of the X trilogy, providing many hours of gaming fun. For those who like to experience that outer space atmosphere outside of the game as well, the X³: Gold Edition also contains a soundtrack CD with music from X³: Terran Conflict. Sounds pretty good. At 40$, i feel like buying it.