This dev journal covers the new headquarter upgrade system coming to Ashes of the Singularity II, and it's worth a watch if you've ever lost a region because your HQ couldn't hold the line on its own. Each faction's headquarters can now be upgraded twice, and the final tier adds a unique turret that fits the faction's identity. The UEF gets a rail gun that hits incredibly hard against armored targets, the PHC Nexus gets area-of-effect artillery batteries that shred infantry and light units before they can soak up damage, and the Substrate HQ gains Serpentine turrets with a more balanced rate of fire for handling mixed threats. The video shows all three in action against incoming attacks, so you can actually see how the damage profiles play out in practice rather than just reading numbers.