Here is an overview of the game, via Sega:
Experience the vast open world of Phantasy Star Online 2: New Genesis, set a thousand years after the events of Phantasy Star Online 2 and the battle of Oracle. Heroes of ARKS, prepare to defend a new world against a mysterious threat.
- Free to play!
- Huge wide-open battlefield environments! Explore a whole new world featuring broad, expansive playfields filled with ferocious enemies waiting for you and your team. Traverse wide-open environments, speed and soar across the giant landscape and skies with new special abilities. Transitioning into a new area is as simple as walking into it—no loading screens.
- Enhanced character models! Create your identity with any character you can imagine in PSO2:NGS using the powerful creation engine. Adjust every imaginable characteristic to create your one-of-a-kind avatar.
- Redesigned graphics engine! Witness lush environments, amazingly detailed player characters, and monstrous foes in razor-sharp resolution. Watch spectacular new lighting and particle effects as weapons clash with armor. See the world as you’ve never seen it before.
- New multi-weapon system and abilities! Combine two types of weapons for smoother weapon switching. Battle at lightning speed using a variety of weapons and techniques.
- Connects with Phantasy Star Online 2! Move easily in-game between Phantasy Star Online 2: New Genesis and Phantasy Star Online 2.
- Cross-platform! PC and Xbox One players can play together side by side.