"Phantasy Star Universe (ファンタシースターユニバース, Fantashī Sutā Yunibāsu) (PSU) is an action roleplaying game by SEGA's Sonic Team for the PC, PlayStation 2 and Xbox 360.
While Phantasy Star Universe is a hack and slash roleplaying game similar to the Phantasy Star Online (PSO) games, it takes place in a (presumably) different time period and location and has many new features. Like most of the PSO titles, PSU is playable in both a persistent online network mode and a full featured single-player story mode."
Source: Wikipedia, "Phantasy_Star_Universe," available under the CC-BY-SA License.