I wish more failed commercial games would do this:
https://www.gamingonlinux.com/articles/ ... urce.13478
https://www.gamingonlinux.com/articles/ ... owel.13457
Source code:
https://github.com/ehmprah/coregrounds (GPL, Assets: CC-NC-SA)
https://bitbucket.org/e_smirnov/aurora/wiki/Home (Apache, Assets: Custom NC, negotiable)