Seoul-based YoshiYoshi Studio has announced KAELIS: Seraph Protocol, a single-player science fantasy JRPG headed to PC via Steam with a 2028 release window. The reveal pairs a new official Steam store page with a live 27,000 dollar Kickstarter crowdfunding campaign and an announcement trailer.
The announcement positions the game as an academy story first and a dungeon crawler second. Players step into the shoes of Kaito, a student turned Executor at Serenos Academy, and split their time between campus life and field investigations into supernatural distortions known as Noise. The name Kaelis draws from the Latin caelum, meaning sky or heaven, which sets the tone for a celestial story about the last city on Earth.
Humanity's last city and the Noise mystery
Two hundred years ago, the world of KAELIS was swallowed by war and reduced to ash. Beneath those ashes, survivors found a faint glow they named Lumina, and they built their last city around that light. Kaelis is described as peaceful and beautiful, yet the light sometimes wavers in ways nobody can explain, and those distortions are what residents call Noise.
Kaito begins the story as an ordinary boy who keeps close the necklace his father left him. That ordinary life ends when the city stops recognizing him as a regular citizen, and he is pulled into field work as an Executor of Serenos Academy, the body that handles Noise incidents. Working alongside the academy's Guardians, he moves toward a truth about the city that no one yet knows. The premise gives the academy setting real narrative weight, since Kaito's school days and his enforcement duties feed into each other instead of sitting in separate boxes.
Dice rolls decide how each case unfolds
The signature system is the Armillary Sphere, a dice-roll mechanic that settles major story paths and incident outcomes at decisive moments. Kaito's clues, field decisions, and character bonds all shift the conditions of each roll, so preparation changes fate rather than leaving everything to chance. Conversations and quieter moments matter too, since how Kaito responds can strengthen bonds and alter the path a case takes before its outcome is decided.
Structure-wise, the game blends academy simulation with field investigations across four specialized divisions of Serenos Academy. Each Guardian belongs to one of those divisions, and spending time with companions through story events and campus conversations deepens affinity. As bonds grow, new sides of each Guardian emerge, and coordinated attacks plus support actions can unlock, changing how the party fights together. Fans of relationship-driven subculture games should feel at home here, while the single-player focus keeps the story personal. Players who enjoy campus stories with real stakes may also want to follow other JRPGs drawing crowds this season, such as Edge of Memories, which locked in a November launch after its own reveal.
Turn-based combat built on eight Lumina Spectrums
Battles use a four-person turn-based system in which every Guardian and every Noise creature aligns with one of eight elemental Lumina Spectrums: Ignis, Glacies, Fulgur, Terra, Lumina, Umbra, Void, and Aether. Each Spectrum carries distinct strengths, weaknesses, and reactions, so scouting a Noise creature's alignment and bringing the right Guardians to the front line sits at the heart of party building. Party members named so far include Amane, Reina, and Kotoha, each with their own attributes and battlefield role.
As an Executor, Kaito can activate the Executor Device to seal and recover Noise Cores from the field. Recovered cores return to Serenos Academy for analysis, where they support Lumina Disc development, facility upgrades, and Guardian growth. That loop ties combat rewards directly into campus progression, which should please players who like their victories to show up as visible upgrades back at base. The focus on elemental scouting and team synergy recalls party-driven RPGs that reward preparation, a design philosophy that also helped Epic Seven find its footing when it arrived on Steam with cross-play support.
Steam page, Kickstarter campaign, and 2028 window
The Steam listing tags the game as Adventure and Indie with single-player support, and names YoshiYoshi Studio as both developer and publisher. A 2028 release window is the only date given so far, so readers should treat any more specific day as unconfirmed until the studio updates the page. The 27,000 dollar Kickstarter campaign runs alongside the Steam reveal, giving early supporters a way to back the project while wishlists accumulate.
PC RPG fans have plenty to watch while waiting. The combination of academy simulation, dice-driven branching, and elemental turn-based combat gives KAELIS a distinct identity in a crowded field, and the Kickstarter performance will be an early signal of how much appetite exists for a new science fantasy JRPG. Keep an eye on the Steam page for demo news, stretch goals, and system requirements as the 2028 window approaches.
When does KAELIS: Seraph Protocol release
The Steam page lists a 2028 release window for PC. No exact date, demo, or early access period has been confirmed, so treat 2028 as the current official target until YoshiYoshi Studio shares an update.
What platforms will KAELIS: Seraph Protocol launch on
The game is confirmed for PC via Steam, where YoshiYoshi Studio serves as both developer and publisher. No console versions have been announced.
How does the Armillary Sphere dice system work
At decisive story moments, the Armillary Sphere casts fate through a dice roll. Kaito's bonds, discoveries, and field decisions shift the conditions of that roll, so investigation and relationship building directly influence how each incident unfolds.
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