Cataclysm: Dark Days Ahead 0.I-1 — Cataclysm contributors, based on Cataclysm by Whales.
Main game code and content: Creative Commons Attribution-ShareAlike 3.0 Unported.
Full license/third-party notices: LICENSE.txt and accompanying font licenses.
Original engine source: https://github.com/CleverRaven/Cataclysm-DDA/tree/7b2efa5cea38e4d4d97dd0e63b28b9148623da59
Browser build by Jeremy Rose / nornagon: https://github.com/nornagon/play-cdda
Frozen browser version: 0.I-1-web-0-i1-e526f4835d
Emscripten 6.0.8 / SDL2, SDL2_image, SDL2_ttf and related library notices retained.
The supplied native WASM, core resource package and tilesets are unmodified upstream artifacts.
Leaf Arcade changes (22 October 2026): integrity-checked static loading, compressed
asset delivery, lifecycle/pause, local persistence fallback, keyboard/touch command
panel and bounded ZIP backups. No gameplay rules or maps are rewritten.
Leaf adapter GPLv3-or-later; fflate 0.8.3 MIT. Sources and licenses in source/.
Tileset credits: source/ASSET-NOTICES.txt and original-source archives.
Full component license texts are retained in licenses/. The upstream build has no
bundled soundpack; this edition is silent. No accounts, purchases, advertisements
or remote game services are required.
Save through the original game before Stop. Clearing browser data removes saves.