From Post-Apocalyptic RPG wiki
This article covers all licensing-related aspects that affect the project as a whole. In case you're interested in how the chosen licenses affect specific development departments in detail, check out the license articles of these departments.
Alternatively assets can be licensed under 'compatible' licenses, that allow re-licensing under gpl 3.0 or by-sa 3.0.
This license choice was discussed in this thread.
Right now all assets are just licensed under the Creative Commons Attribution-ShareAlike 3.0 license. We should explore in an infrastructure proposal how useful dual licensing of assets is in reality.
Documentation has been formerly licensed under the GNU Free Documentation License. We've decided to switch from the GFDL to the Creative Commons Attribution-ShareAlike 3.0 license, so that wiki content and assets are released under the license.
The main reason for this change was that the writing content will mainly reside at the wiki before it finds its way into the game. By using the Creative Commons license for wiki content as well, writing content is published under the same license, regardless of where it resides: wiki or ingame.
The license change was discussed in this thread.
Both the GNU General Public License 3 and the Creative Commons Attribution-ShareAlike 3.0 licenses have the following characteristics:
- They require attribution
- By requiring attribution we can ensure that users of assets need to actually give us proper credit if they use our assets. The GPL has an attribution requirement in form of required copyright notices.
- They are copyleft/share-alike
- By licensing our assets under copyleft/share-alike terms users of our assets are required to grant their users the same rights that we have granted them. E.g. they would need to grant their users the right to modify the assets and share them in case we allow modifications to the assets.
- They permit commercial usage (but not proprietary usage)
- By allowing commercial usage, strict GNU/Linux-distributions can include PARPG on physical mediums. Commercial exploitation is unlikely as we actually license the content under attribution and share-alike clause. This way everyone who uses the content would have to give us proper credit and grant their users that same rights as we granted the users of our content. So if anyone would try to make money with the assets, everyone who bought them would be legally allowed to freely redistribute the copyleft/share-alike ones.