Space station 13 standalone went GPL last month.
http://spacestation13.com/2015/01/open-sourced-ss13/#comments"Hey guys, here’s an update for you in regards to SS13 Standalone.
After a period of putting this project on hold, We’ve made the decision to release the source code, meaning the standalone is now a fully open-sourced project. Here’s a few things you should know:
WHY?
Unfortunately, we were unable to dedicate enough time to work on this project full time.
During development, many of our lives were changed via real world factors. Starting families, babies, jobs etc. While progress was impressively fast at first, all of these things ultimately contributed to us running into difficulties with continuing the project.
We made a promise to libre the project if we ever decided to stop development. While this was a heated internal debate, the decision was ultimately to call it and go ahead.
Releasing what we have as an libred project will hopefully inspire the SS13 Community, and give them a chance to work on the project in our stead. We’ve already seen a lot of interest and discussion among the larger community, spanning every branch of the game. We hope that this will lead to some form of collaboration."
https://github.com/ss13remake/ss13remake/blob/master/LICENSE-CODEPost last edited at