On 08/29/2017 02:53 AM, Lyberta wrote:
> Hi. I'm working on the video game called Xonotic[1] that was based on
> the Quake source code[2]. This code was originally released under the
> terms of GNU GPLv2 and I can't find if it has the "or any later version"
> clause. I want to license my code additions under GPLv3+ or AGPLv3+. Can
> I do this?
> 
> [1]: https://xonotic.org/
> [2]: https://github.com/id-Software/Quake
> 
> 

You'll need the "or any later version" clause from the GPLv2 stuff. You
can ask all the copyright holders if they are willing to add it.