Twin Soul: Core 8s Rhythm-Action Game Draws on Ancient Japanese Mythology

Twin Soul, a side‑scrolling rhythm‑action title from Core 8, has just released a free demo on Steam, offering PC players a taste of its music‑driven combat and myth‑laden visuals. The game, the brainchild of former Sega artist Noboru Hotta, marries the pulsing beats of contemporary tracks with the haunting lore of Japan’s oldest myths.

Hotta, best known for shaping the audiovisual experience of Rez and the puzzle‑matching game Lumines, says he has always chased originality. "When we talk about Rez and Lumines, they’re kind of iconic…Nowadays, gaming companies in Japan as well as all over the world follow trends, but I’m still trying to push new and original ideas," he explained. His history of experimental design informs Twin Soul’s emphasis on fresh, non‑conventional gameplay.

The demo centers on two protagonists, Jin and Shin, each riding a beast‑like companion through a side‑scrolling world. The combat system blends lock‑on shooting with melee strikes, and every action emits a sound that feeds into a growing rhythmic soundtrack. As the player switches between the two characters, the perspective flips, so one segment scrolls left‑to‑right while the next moves in the opposite direction. Rhythm isn’t just an aesthetic; it’s the engine that powers the entire experience, turning every bullet and slash into a musical note.

Narratively, Twin Soul draws heavily from Japan’s ancient Kojiki as well as the prehistoric Jomon and Yayoi cultures. Hotta admits, "I got so much inspiration from authentic Japanese mythology, but I don't lean in that direction heavily…Over time, I even tried to put in a modern style of music, so you’re told the story through rap!" The result is a story told through a blend of traditional motifs and contemporary beats, all rendered in deliberately non‑realistic art. "I doesn’t want to lean into anything realistic, because art is art," Hotta said.

The project began more than a decade ago while Hotta was a co‑founder of Grounding Inc, a studio that eventually grew too large for his experimental ambitions. After leaving Grounding to form Core 8, he returned to a lean team that could focus on titles like Twin Soul. The game has been pitched to publishers, who often remark that its art “looks like it was created overseas.” Hotta takes that as a compliment, noting that his work reflects both Japanese and Western influences.

Today’s demo is available for download on Steam, but Core 8 has not announced a release date for a full version. The studio has also not confirmed whether the demo will be expanded into a complete title or if additional content will be added. Players can experience Twin Soul’s rhythm‑based combat and myth‑inspired world through the demo, but future updates will depend on the studio’s development schedule.

In short, Twin Soul offers a unique blend of Japanese mythology, experimental music design, and side‑scrolling action, all wrapped in a striking visual style. While the free demo lets players test the waters, the lack of a launch window means the full experience remains on the horizon. For now, fans of rhythm shooters and indie experimentation can explore the demo’s vibrant beats and ancient tales, hoping that Core 8 will eventually bring the complete vision to market.