COPYING

Clonk game content is available under the following license. This applies to graphics, audio data, scripting, and text found in the game release packages (usually packed inside c4f, c4g, and c4d group files).

Creative Commons Attribution-NonCommercial (CC BY-NC)
http://creativecommons.org/licenses/by-nc/4.0/

You are free to:

Share - copy and redistribute the material in any medium or format
Adapt - remix, transform, and build upon the material
Under the following terms:

Attribution - You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
NonCommercial - You may not use the material for commercial purposes.

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If no author is specified, the file was authored by RedWolf Design.

Multiple contributors:
LanguageDE.txt, LanguageUS.txt: RedWolf Design, George Tokmaji (Fulgen), Markus Mittendrein (Der Tod)
C4.c: RedWolf Design, George Tokmaji (Fulgen), Markus Mittendrein (Der Tod)
Commits.c RedWolf Design, Markus Mittendrein (Der Tod)