Similar but in this case the Linux Kernel/Init System act as the PXE firmware so you don’t need a TFTP Server to load initramfs and a Kernel image. And you don’t need a NFS or Samba server because the Server has the drive with the rootfs already exposed to the network.
I remember this. I refunded the game ASAP. For the longest time they’ve neglected the Linux client to the point where it was just broken and crashed often and you couldn’t even play with Windows players because the Linux client was so far behind. And of course the Windows version ran just fine on Linux via Proton. Yet they seemed surprised and annoyed whenever Linux players pointed this out. That’s where I lost all my respect for them as a developer. I would refund Gary’s Mod too if I could.