Not really a successor, but as the poster above said, a cousin.
This lineage of open-source games started from Total Annihilation, which had a lot of mods that ran into engine limitations. This resulted in a bunch of enterprising open-sourced devs to develop a compatible engine, without those limitations. This engine (Spring Engine) has then evolved into something much more impressive and capable. Zero-K was implemented on this engine. Beyond All Reason uses the Recoil engine, which is a fairly recent for of Spring.
Eh, the engine was a accident. It started out as a 3d-viewer, capable of replaying ta games by the svedish yankspankers (clan sy).
What started out as a viewer, escalated into a 106.0 version long engine, providing a war that consumes planets, each side with only one final wish - Total Annhilation at Zero-k, beyond all reason.
Naw, the community comes and goes ebbs and flows. Its mostly on recoil discord, some are still on the irc server, the rest is on the BAR discord.
Presuming that the main code contributions also come from the Swedish scene I'm not entirely surprised that this happened. It sort of fits my impression of the gamer/programmer culture here (although I can't quite express why)
Surprisingly, that was only one metal band and every other metal band hates them for it. I have been told the average metal fan freaking loves churches and their acoustics. They might not like The Church, but they love churches.
This lineage of open-source games started from Total Annihilation, which had a lot of mods that ran into engine limitations. This resulted in a bunch of enterprising open-sourced devs to develop a compatible engine, without those limitations. This engine (Spring Engine) has then evolved into something much more impressive and capable. Zero-K was implemented on this engine. Beyond All Reason uses the Recoil engine, which is a fairly recent for of Spring.