SEGA's Phantasy Star Universe expansion, Ambition of Illuminus, is available today for Xbox LIVE users, ahead of the PC and PS2 releases scheduled for January 11, 2008.

1600 Microsoft Points gets gamers an expanded universe featuring new maps, levels and lobbies. There are also more robust customisation options for characters, armour and clothing.

Remember that you'll need a valid Guardians license and the original Phantasy Star Universe game disc in order to play.