This 2017 Expansion for Phantasy Star Online 2 shifts gameplay to the medieval fantasy dimension of Omega, requiring the base game. You explore this new world corrupted by Ephemera, continuing the core action RPG loop of intense hack-and-slash combat. Its most significant feature is the introduction of the advanced "Hero" class, which uniquely masters all combat styles (melee, ranged, tech) with specialized movements. The story involves rescuing Harriet and confronting the true nature of the Profound Darkness within Omega.
As a significant expansion, this content is not a standalone title; it requires the base game, *Phantasy Star Online 2*, which operates on a free-to-play model across PC (Windows), PlayStation 4, PlayStation Vita, and Xbox One platforms. The scope of this update is substantial, introducing a completely new world map, a dedicated storyline, and a host of new characters central to the Omega narrative. It integrates directly into the existing ARKS operative framework, providing a deep continuation of the overarching plot while offering fresh environments and challenges.
The most notable addition to the gameplay mechanics is the introduction of the first advanced class, the Hero. This class is designed as an expert archetype capable of mastering all three primary combat styles—batting (melee), shooting (ranged), and law (tech/magic)—though it utilizes existing weapon types with entirely new, unique movement sets and attack patterns. This fundamentally alters how players approach combat, offering a highly versatile and dynamic playstyle that recontextualizes the use of established weaponry.
The adventure begins after a critical confrontation involving the Profound Darkness sends the player and Matoi into an alternate dimension. Upon arrival in Omega, players meet Harriet, a young girl central to the dimension's fate. The atmosphere shifts to one of medieval warfare and mystery as players work to cleanse Omega from the Ephemera corruption. The narrative involves absorbing the consciousness and powers of defeated Dark Falz hosts, leading to a confrontation with Elmir, who manipulates events to serve Omega's true, darker nature. The conclusion sees the player facing a resurrected threat imbued with the power of the Profound Darkness.
Beyond the central new character, Harriet, the expansion features the return of familiar faces like Xiao and Sierra, albeit in altered appearances. The primary antagonists revolve around the hosts of Dark Falz encountered across Omega's four distinct countries, culminating in the reveal of Elmir's true intentions. The final confrontation involves Shiva, a powerful Photoner resurrected through the black hole's energy, providing a challenging end-game encounter.
This specific content release is delivered as a major expansion update and is fully integrated into the free-to-play structure of the parent game. It adds the new medieval fantasy world of Omega, the central storyline revolving around Ephemera, the new Hero class, and numerous new characters and enemy types associated with the alternate dimension.