The final book in James S.A. Corey’s The Expanse series, Leviathan Falls, was released in 2021. The TV adaptation, which first aired on Syfy before moving to Prime Video, wrapped up its six-season run in 2022. Case in point: It’s been a long time since fans of The Expanse have had something to get excited about, but in 2027 that’s about to change.
Owlcat Games is the driving force behind The Expanse: Osiris Reborn, a narrative-driven RPG due out in spring 2027 that the studio hopes will revitalize the franchise. In addition to recently dropping a new trailer offering a sneak peek of the project, the studio also made a major announcement: it has cast a new actor for the game’s main protagonist.
The Expanse: Osiris Reborn casts a new protagonist
Osiris Reborn is a narrative-driven, action-packed RPG set in the universe of The Expanse, but it promises to tell its own original story not tied directly to any single book or season of the show. Owlcat Games, the studio behind Pathfinder: Kingmaker and Warhammer 40,000: Rogue Trader, described the game in an official synopsis that reads: “By the 24th century, humanity has conquered the cosmos. However, life has remained anything but easy. In The Expanse: Osiris Reborn, a story-driven sci-fi action RPG, you play as a Pinkwater Security mercenary whose brief shore leave on the asteroid Eros spirals out of control. Trapped in a deadly lockdown and drawn into a solar system-wide conspiracy far beyond your control, you’ll have to adapt, survive, taking command of the most advanced ship in the whole of the solar system.”
Though both the female and male protagonists are customizable before you start the game, the default appearance and voice of the male protagonist and his twin have officially been recast. The role is now being played by Blythe Melin, a voice actor best known for his work in Genshin Impact and Honkai Star Rail. In a video posted to its social channels, Owlcat Games also revealed that the default appearance of both the male protagonist and his twin were also redesigned.
In an interview with RPG Site, Melin described being selected for the role of the twins in Osiris Reborn as “an incredible joy and a unique challenge.” “Playing twins has definitely been tricky, but there is somewhat of an easy divide that can be made between the Captain and J, in that one is an avatar for the player themselves, and the other is a pre-established co-character within the context of The Expanse. This allowed us to give J more of a solidified personality to work off of, with a lot of credit going to the writers and directors,” he said.
While the first voice actor was never publicly named, the male protagonist’s original voice was criticized by players during the game’s closed beta, who complained of a lack of emotion from the actor. In response, Owlcat Games released an official statement in May 2026, writing, “While the voice actor for the male protagonist and J put in a lot of good work, they felt less expressive than we wanted. Because of this, we are changing the voices of the male protagonist and J.”
