Creative Commons Attribution
Creative Commons Attribution, also called CC-BY, is a free, permissive license.
CC-BY allows for sharing and modification of given work under the condition of giving credit to the author. The attribution has to include specified information (e.g. the name of the author, copyright notice and license notice) in order to be considered appropriate.
It is intended for classic art works, which in context of games is the media. It is not recommended to be used for source code.