Firstly I'm unsure if the reason these hasn't been fixed is it was never posted beyond linux discussions, but these are a 2 year old set of issues that needs addressing, there are 2 bugs, and the only way around them is bug avoidance as there has been no bug fix. I will do these in order of perceived priority, and I am aware that I am repeating what I have said on discord, but I want to make sure that there is an acknowledgement from the devs that they are aware of this, and hopefully, are aiming to fix these issues.

Bug 1:
The main teleportation room (containing 10 teleport entry portals)

Here is my discord post about this:
https://discord.com/channels/592595839600558080/699066708555726878/945508607326289930

And here is the forum thread I found:
https://gtm.steamproxy.vip/app/362890/discussions/1/1874001065337572523/

These lag spikes are unbearably bad. To have to frequently save and reload the game is completely ridiculous. It takes all enjoyment out of doing that part of the game, and I've spent a couple of hours trying to play with any number of settings from both the in game audio and visual settings, and my GPU.
It is a bug that has persisted for years, and I'm shocked that this game has been released out of beta with this and the next bug, these are gaming breaking. I'm not going to edit my previously positive review (yet) because fair is fair, if something has slipped through the net, even though it shouldn't in the first place, I don't think it'd be a terribly nice thing to do without giving the devs a chance to resolve this.

================================================
Bug 2:

My discord post about this:
https://discord.com/channels/592595839600558080/699066708555726878/945127291288191017

Forum post I found, which didn't contain a solution:
https://gtm.steamproxy.vip/app/362890/discussions/1/340412628175324858/?ctp=12#c3826310840384094598

Once you have the Gluon gun, you go down an elevator, if you go around a corner, get the hound dogs attention, and then double back to the elevator, then during combat (unsure if it's killing them or their attack that causes this) will cause a game breaking error, in fact if I don't shut my computer down immediately (even going into htop, a linux equivalent of task manager, to get the pid and kill the process was too slow and my computer became completely unresponsive (this was in TTY). I had to hold the power button down to turn the system off. Which is again, a terrible terrible error. To avoid the bug you have to do the combat away from the elevator.
========================================

These issues do not seem specific to any particular system, intel, nvidia, amd, it doesn't seem to make a difference, but just because, here are my specs:

OS: Arch Linux x86_64
Kernel: 5.16.10-arch1-1
Uptime: 16 hours, 31 mins
Packages: 1013 (pacman), 27 (flatpak)
Shell: bash 5.1.16
Resolution: 2560x1440
DE: GNOME 41.4
WM: Mutter
WM Theme: Adwaita
Theme: Breeze [GTK2/3]
Icons: breeze [GTK2/3]
Terminal: gnome-terminal
CPU: Intel i7-7700K (8) @ 4.500GHz
GPU: NVIDIA GeForce GTX 1080
Memory: 5786MiB / 15934MiB
Nvidia packages (fully updated)
nvidia-dkms 510.54-1
nvidia-settings 510.54-1
nvidia-utils 510.54-1

Thank you.