I'm a little confused what you mean by "projects like this"   Also, Linux isn't a single entity, so I don't know what they on a whole would do. And sometimes some lesser known distros take longer with updates.

It'll be released....  Eventually. I'm working on two projects at the moment; one that features many non-human races (albeit not specifically fantasy) will probably come out first, since there's a whole world/lore there and that's been my favourite one to work on lol

A few weeks ago I researched other projects like this and there aren't many. I don't know why Linux doesn't get ready to incentivize gaming.

Funny, I like how they don't know the context yet. They're going by the title, and it's about a different game.

That would be something to contact PureOS about. You could open a bug tracker here: https://tracker.pureos.net/ and see what they say, though it seems pretty inactive. They'd have to implement a patch of some kind or get Debian to update the 0 A.D. version in testing (which is what I think PureOS pulls from)