Phantasy Star Universe (ファンタシースターユニバース, Fantashī Sutā Yunibāsu) (PSU) is an action role-playing video game developed by Sega's Sonic Team for the Microsoft Windows, PlayStation 2 and Xbox 360 platforms.

After killing multiple creatures and saving people, Ethan finds Lumia and they leave the station.

Ethan and his classmate Hyuga Ryght are trained by a GUARDIAN named Karen Erra, who leads them against the S.E.E.D, the monsters that came from the meteors.

Karen discovers she is the sister of the Divine Maiden, the prophet of the Holy Light, and takes over that role when her sister dies at the hands of her estranged father who intended to kill Karen to increase the power of the original Divine Maiden (Mirei).

Ethan helps activate an ancient weapon the prior civilization used to survive the S.E.E.D before they were almost completely wiped out.

In the outpost, Magashi claims to have been resurrected by the S.E.E.D, but he is actually a CAST incarnation of Dark Force, who controls the S.E.E.D and whatever they infect.

Shortly after the defeat of Magashi and the Endrum Collective, a mysterious group known as the Illuminus have appeared and threaten to exterminate all non-human races.

Although it is an expansion pack, the Windows and PlayStation 2 versions of Ambition of the Illuminus are standalone and do not require the original game to play.

Ambition of the Illuminus introduced numerous new features to Phantasy Star Universe including new weapons, Photon Arts, missions, clothing, enemies, and more.

Due to low levels of use, the North American and PAL PC/PS2 servers of Phantasy Star Universe were shut down on March 31, 2010.

[25][26][27] Erik Brudvig of IGN said of the PlayStation 2 version, "The result is an unsatisfying and stale experience that feels like an update to an old game that has had its day rather than a new title.

The games offer new features and content; as in the Ambition of the Illuminus expansion pack, players play through the story mode as their own characters.