works perfectly out of the box
Works like a charm

PROTON_USE_WINED3D=1 %command%
The launch option might help if the game won't start. Great game, no issues during gameplay.
Läuft einfach

Works just fine out of the box
Perfect multiplayer experience
Works out of the box.
Game just works, and its amazing

runs flawless

Works well

mangohud gamemoderun %command%
Game performing extremely heavy, similar to We Were Here Too.
In some chapters (1 - The Valves and 6 - Strange Encounters), the game became extremely heavy (100% GPU usage, 20-40 FPS) for me and for my coop partner. For some reason, sometimes the rooms loads normally without this problem.
Just one unstable connection, nothing to worry about.
Played with Proton-Experimental [bleeding-edge] in Medium settings, 1080p fullscreen with 60 FPS stable.

Takes a couple of seconds to start.
No issues
I played through a ton of puzzled talking over the in game walkie talkie system and had a blast. Never even thought about being on Linux...
I played online with a friend and we used in game voice chat, never had a single issue. Didn't think about it at the time but it's kind of nuts that the in game chat worked so well...
Подключились не с первого раза.
gamemoderun %command%
Utilisez Discord pour pouvoir communiquer avec son partenaire, cela casse un peu l'immersion.
Micro non reconnu et impossible d'entendre le coéquipier ingame
Lags lorsqu'on bouge la souris vite.
runs out of the Box

Runs great out of the box
Chapter 8 didn't initialize properly, making it impossible to solve. Restarting the chapter solved the issue. Seems to be a known problem and not caused by Proton.
Both players played on Linux with Proton. Did not try the in-game voice chat.
Ran fine after switching Proton to 4.11-13 and disabling full screen.
Voice chat is not available. You must use an external voice chat.
Disabling full screen, and then setting the window to full screen with my window manager (mod+f in sway) resolved the issue
Before disabling full screen my mouse did not work. I had to use WASD and enter / escape to navigate the menus to change the video settings.
Seemed to work perfectly other than in game microphone not working
In game microphone did not appear to work.
One puzzle had missing textures which made it unsolvable, otherwise seemed to run perfectly.
In game microphone did not appear to work. Used Discord instead.
Some textures on one of the puzzles (Knights Puzzle) did not render which made the puzzle unsolvable.
The game does not launch if on an NTFS partition. It runs smoothly otherwise.
Game does not launch if on an NTFS partition.
Works great!

There was an issue when I've run the game at the Ubuntu 19.10.
Screen: DX11 could not switch resolution
It can not be fixed by setting the environment variable "PROTON_USE_WINED3D=1" because it will produce the game render issue. I've found another way to solve this problem. It looks like the problem is in the Vulkan API. To check this assumption "vkcube" can be executed and if it throws an error then this command can help to fix it:
sudo vulkaninfo
Also, it fixes the first issue with resolution switch.

The game crash
PC hangs during level startup.

crashes when starting a game sometimes, runs flawlessly otherwise


Runs almost perfecly OOTB. I just had some graphical issues with max graphics settings. If you expereince them too (You will notice that), try to reduce some graphics settings (escepcially Quality preset and texture quality). And once i had a complety black screen after loading the map. Quitting and retrying resolved that issue.



The game crashed the first time I started it, when I started it again it ran flawlessly.


Ran perfectly fine out of the box, coop with no issues.


Works perfectly fine. Takes a second to start up, but other than that no issues. If you're having trouble with not being able to connect to friends, it's not because of Proton. Make sure you are both have the same region set in the game settings.


Perfect, no bugs or errors. Native performance

The game launches perfectly but fails to connect to the game server. Message: "A connection to the game server could not be established. Please check your internet connection."