Xenosaga Episode III follows on from Episode II, It has been a year since the events of Episode II and since then Shion has resigned from Vector Industries, with her departure the KOS-MOS Project has ended and it appears a new android named T-elos has taken her place within Vector. T-elos appear simlar to KOS-MOS but seem to be far more powerful.
Episode III like Episode I has not been released in the UK or Europe, however many people are still hopeful that it will be released.