Classic-style slots provider 1spin4win is expanding its Japanese collection with Sound of Steel Hold and Win, a new chapter escalating the saga with a Hold and Win battle. 

The supplier has secured exclusive prerelease distribution for the game with Royal Partners casinos. The studio said the selection for prerelease signals operator demand for the story-driven, ongoing multi-game storyline.

The title continues the rivalry between shogun Masahide and ninja Koniro. Sound of Steel Hold and Win places the storyline at a point where Masahide has taken Tomoko-hama, a geisha, to his castle. The clash between the two characters plays out during the Bonus round.

The Japanese collection uses narrative and visual continuity from game to game, introducing new plot elements and characters while carrying existing arcs forward.

The slot uses Hold and Win mechanics consistent across the four games currently in the series. Players may land two rewards in the Bonus round — an x100 Minipot Coin and an x1,000 Megapot.

The latest release includes a 3×3 layout, a maximum multiplier of x1,500, and Wild symbols that support the formation of winning combinations. A Buy Bonus feature is also available for direct entry into the Hold and Win round.

“Sound of Steel Hold and Win is another proud addition to our special Japanese game collection,” said Olga Bogdanova, Art Director at 1spin4win. “Through a carefully crafted combination of art, animation, and unique mechanics, we were able to convey the characters’ confrontation and intensify the game’s atmosphere.”

1spin4win has produced over 180 classic online slots built around mathematics and transparent mechanics. It also offers promotional tools for casino operators focused on player loyalty.

AloJapan.com