Yes, but always is a problem with FOSS in case of complex apps or games, which need several different licenses. There isn’t a more complex game which is full FOSS. For Example FreeDoom is Foss, but without the original Doom wads, at least the basic shareware wads, you can’t even play it. In Ashes they had used a conversion with the GzDoom engine with wads made by users. But which license it has depends on every user which had create a wad file. In The Dark Mod the engine and the editor are OpenSource, but every map created may have a different license, maybe OpenSource or CC, depending on the license of the art assets used for it, OpenSource when they are the default assets of the editor, but if not, only the author knows, maybe own designs or from third party repos. Uniied licenses are only possible in simple apps and games, because of this there are very few OpenSource games out of table games or sidescrollers of the '90. Not so easy with FOSS in some cases.