Phantasy Star Universe. Though the game lost some platforms just over two years ago when the PS2 and PC versions were shut down, the XBox 360 version remained intact. Thus, PSU quietly lived on as a console MMO where players could complete missions on worlds like Parum and Neudaiz, craft items, or decorate their private living space. Now, SEGA has announced that this last living remnant of the online game will take its last breath on September 7th, 2012. The single player version, however, will still be available.
SEGA noted that the decision to close the game was not an easy one, but that the company was preparing to "provide [players] with new opportunities and new experiences." The company thanked all of the players who have supported the game over the years and assured that any who have an active Guardians license following the final date will have their pro-rated subscription refunded. GM Edward also revealed that a number of server-wide bonuses have been added and that plans were in the works for some celebratory events so that the Universe could go out with a bang.
[Thanks to BGO for the tip!]