Sopwith — David L. Clark, Simon Howard and contributors. GPLv2 or later. Free engine and original game assets included; no purchase or imports required. Leaf changes: SDL browser build with no desktop TCP/IP. Configuration/high scores stay local. Manual is hosted locally; app-install menu hidden. Built locally with Emscripten 4.0.23 and SDL2/Asyncify. Browser adapter GPLv2 or later. Source: source/ includes exact upstream source, overlays/build scripts, additional linked library source, and shared Emscripten/browser library sources at ../scummvm/source/. Original COPYING and upstream author/asset notices are preserved in the complete source archives. Boost Software License 1.0, PhysFS zlib license, Lua MIT, tinyxml2 zlib and libmodplug public-domain/MIT notices are included in source archives as applicable.