OpenTTD 15.3 — OpenTTD contributors; see CREDITS.md and COPYING.md (GPLv2).
Leaf Arcade compiles the official source with Emscripten 3.1.57 and SDL2.
Browser integration changes dated 2026-10-05: expose filesystem/pause exports;
bundle local OpenGFX/OpenSFX; use event-driven browser file persistence;
disable network availability for this singleplayer release; provide an isolated,
lazy, integrity-checked player with pause, teardown, touch input and save transfer.
Keep SDL game pixels independent of CSS display resizing in the browser.
The original simulation and game rules are unchanged. MIDI music is unavailable.
OpenGFX 8.0: GPLv2. Full notices and credits: opengfx-8.0-license.txt and
opengfx-8.0-readme.txt. Its editable source is provided in source/.
OpenSFX 1.0.3: sound collection under CC BY-SA 3.0; individual sounds also
include CC0/CC BY works. Tools have their own GPL/CDDL terms. Full licenses,
authors and upstream sound links: opensfx-1.0.3-license.txt and readme.txt.
Base sets are unchanged. No original Transport Tycoon Deluxe assets are bundled.
OpenTTD, adapter, assets and linked library corresponding source: source/.
Each engine/asset component retains its license; no upstream endorsement implied.
Upstream: https://www.openttd.org/ ; https://github.com/OpenTTD/OpenGFX
https://github.com/OpenTTD/OpenSFX