YSoccer by Massimo Modica, Daniele Giannarini and Marco Modica. GNU GPLv2 or later. Original game data and attribution: assets/docs/readme.htm and assets/docs/license/gpl.txt. Browser port by ray77 uses TeaVM, libGDX and gdx-teavm; exact Java/Gradle source is supplied. Leaf lifecycle/storage adapter MPL-2.0; game launch notification added without changing game rules. No original Sensible Soccer or SWOS game data is bundled.