Phantasy Star Portable

 is an action role-playing game co-developed by Sonic Team and Alfa System, and published by Sega for the PlayStation Portable. Sega released the game to Japan in July 2008, and to other markets in 2009.
In addition to the game's single-player story mode, "Phantasy Star Portable" has a cooperative multi-player mode that supports up to four players.
The 2009 sequel, "Phantasy Star Portable 2", takes place three years after the events of "Phantasy Star Portable".
Plot.
"Phantasy Star Portable" begins a few months after the conclusion of "Phantasy Star Universe" (2006) and its expansion, "Ambition of the Illuminus" (2007), in which an alliance of humans, newmans, beasts, and CASTs of the Gurhal star system drove off alien invaders known as SEED. The peace is short-lived, however. Vivienne, a newly constructed CAST android, and her partner (the player), discover that some SEED remain, and are causing trouble. Vivienne and her partner work to save the Gurhal system—and, in the process, learn more about humanity.
Gameplay.
The player begins by choosing one of four races and three character classes. The character design is adjustable through several variables: face model, eye color, eyebrows, eyelashes, ears, head type, body color, proportion, jacket, pants, shoes, voice type, and voice pitch.
Players are assigned missions in which they must kill all opponents in the area; many of the levels conclude with a boss battle. Along the way, players collect weapons, armour, money, and other helpful items.
Reception.
The game received "mixed" reviews according to the review aggregation website Metacritic. In Japan, "Famitsu" gave it a score of one nine and three eights for a total of 33 out of 40.
In its first week on sale in Japan, the game sold more than 342,000 units. "Phantasy Star Portable" was the 14th best-selling game in Japan in 2008.