Id Software's Quake 2 v3.21 with Vulkan support.
The goal is to maintain as much compatibility as possible with the original
game, so there are no fancy visual upgrades here – just pure, vanilla Quake 2
experience as we knew it back in 1997.

Note:
Game data (pak[0-2].pak) must be placed in %{_libexecdir}/vkquake2/baseq2/