Mixed licensing. Nuclear Tech: Second Dawn is a modpack collection maintained by BySally; no blanket relicensing of third-party content is claimed. Applicable adapted Nuclear Tech: New Horizons (NTNH) quest and progression materials remain licensed under Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0), with credit to Bufka2011 and the NTNH contributors. Each included mod, resource, font reference and code component retains its own applicable license, copyright and attribution notices. NTSD Core code has scoped GPL-3.0-or-later terms and separate retained-resource licenses; NTSD Early Loading and Menu Background code are LGPL-2.1-only. See the installed CREDITS.md, ntsd/legal notices, original JAR notices and the corresponding public module sources. NTSD artwork is identified as AI-generated with OpenAI at BySally’s direction; exclusive copyright in every generated element is not asserted. This notice does not impose restrictions that conflict with third-party licenses. NTSD is independent of Minecraft, Mojang, HBM and NTNH.