0ad-0.0.27-rc1-27645-alpha AppImage

You can download either the "focal" or "jammy" AppImage (the codename is part of the AppImage filename). If you have a GPU that has a chipset other than Nvidia, the Vulkan backend may be automatically disabled in some cases. If that happens to you, and you downloaded the "focal" image, try the "jammy" image (note the "jammy" image is less likely to work on older distros, but the vulkan backend is more likely to work).

More info about this release at https://wildfiregames.com/forum/topic/107313-alpha-27-pre-releaserelease-candidate-build-testing