It appears we missed this one from December last year, vkQuake2 is Quake 2 amplified with Vulkan support.
Quake II was originally released in December of 1997, making this 21 year old game still see new project appear thanks to id Software releasing the source code under the GPL. vkQuake2 has been the hobby of Krzysztof Kondrak as announced on Twitter.
Firstly, it's worth noting that this version doesn't currently support Linux but it is firmly in their plans. vkQuake2 isn't just adding in Vulkan though as it also added support for newer screen resolutions; original compiler warnings have been fixed; the effects for lava, water and slime now get drawn properly with Vulkan; the software renderer was replaced with KolorSoft 1.1 to gain coloured lighting and fixes severe instabilities of the original renderer and so on.
Find vkQuake2 on GitHub.