This specific version was a landmark "bonus update" that introduced significant content and technical enhancements:

The string refers to a digital software package for Splatoon 3 on the Nintendo Switch. This specific filename follows a standard convention used in the homebrew and emulation community to identify game titles, versions, and regions. Technical Breakdown of the Filename Splatoon 3 : The human-readable title of the game.

: On the original Nintendo Switch, certain non-essential background elements were removed from competitive modes (Anarchy Battle) to maintain stable performance compared to the newer hardware.

corresponds to Version 10.0.0 , which was a major update released on June 12, 2025.