Name: Anonymous 2019-08-01 15:24
Your list seems to be missing this one:
https://github.com/freedoom/freedoom/issues/151
https://github.com/freedoom/freedoom/issues/151
https://opengameart.org/content/fiery-explosion https://pixabay.com/en/fireball-explosion-disaster-422750/ Relicenses proprietary-licensed image into Public Domain CC0, which the original license (https://pixabay.com/en/service/license/ ) doesn't allow.This was uploaded in 2014, back when pixabay had CC0 license.