1spin4win presents Sound of Steel Hold and Win, the fourth chapter of its Japanese saga

We’re excited to introduce Sound of Steel Hold and Win, the latest addition to our captivating Japanese collection. The game has already been selected for exclusive prerelease by Royal Partners casinos, highlighting operators’ strong interest in story-driven slot experiences.

Our multi-part collection stands apart from other similar formats thanks to narrative and visual continuity, a concept rarely seen in the industry. Each release builds on the shared storyline while presenting new characters and plot twists. This approach allows us to deliver a truly immersive experience that draws players into the world of ancient Japan and keeps them engaged in the evolving saga.

In Sound of Steel Hold and Win, the tension between shogun Masahide and ninja Koniro escalates when the shogun claims Tomoko-hama, the clever and elusive geisha, for his castle. This epic confrontation for power, justice, and Gentle Fox’s fate unfolds in the high-stakes Bonus round, powered by the popular Hold and Win mechanics featured across the collection. Players can aim for two noble rewards — the x100 Minipot Coin and the x1,000 Megapot. The excitement and suspense of chasing a big win make the Hold and Win mechanic an absolute player favorite.

This release also injects fresh excitement into the gameplay with a dynamic 3×3 layout, a maximum multiplier of x1,500, and Wild symbols that help form winning combinations. Additionally, a feature unique to this chapter, the Buy Bonus option, allows players to jump straight to the most exhilarating part — the Hold and Win round.

Despite its layered narrative and rich feature set, Sound of Steel Hold and Win maintains simple mechanics and intuitive gameplay, making it accessible to both new and seasoned players. This balance is a hallmark of our signature style, and we’re proud to continue raising the standard for classic online slots with every release.