

using PROTON_USE_WINED3D=1 %command% made me able to launch the game
launch options: PROTON_USE_WINED3D=1 %command%
When I launched the game I had an average of 18-24 FPS, unplayable

Hints on lockers and alike are very small
Starting the game, there might be a screen requiring the spacebar to be pressed (steam+x)
Works perfectly fine
Frame were a little lower than usual, but overall the game ran all right.
Installed Steam, enabled Steam Play, tested Proton experimental and 6.3-5. Press Play, game does not start.

Proton-6.9-GE-2 GloriousEggroll
https://github.com/GloriousEggroll/proton-ge-custom/releases/tag/6.9-GE-2
Some parts of the map lag a lot, just avoid having camera there.
I intitially got a black screen after initial game loading. This is in fact a failure to play intro video. Found two other users on windows having the same problem. In my case i could resolve it by replacing the intro video with another video using xvid and mp3 encoding. I still get black screen but the video sound starts playing and i can use space to skip to main menu. Singleplayer probably has similar issues as it also has cutscenes but multiplayer works great!

Worked fine in the last two betas but now i get a loading screen then stuck at a black screen.
Getting some gstreamer decoder errors in stdout even though i have all the gst-plugins installed (64 and 32bit): Missing decoder: MPEG-4 AAC (audio/mpeg, mpegversion=(int)4, framed=(boolean)true, stream-format=(string)raw, level=(string)2, base-profile=(string)lc, profile=(string)lc, codec_data=(buffer)1190, rate=(int)48000, channels=(int)2) Missing decoder: H.264 (High Profile) (video/x-h264, stream-format=(string)avc, alignment=(string)au, level=(string)4, profile=(string)high, codec_data=(buffer)01640028ffe1001967640028acd940780227e5c04400000fa40003a9803c60c65801000568ebecb22c, width=(int)1920, height=(int)1080, framerate=(fraction)30000/1001, pixel-aspect-ratio=(fraction)1/1)
I think it is related to the new intro movie.

Unique game runs like native
Public playtest is a bit buggy (unsurprising for pre-release), but I do not believe any of the major bugs are Linux specific. Overall feels like native with good framerate on default ultra, only a little frame-y in busy fights. In-game chat often fails to come up when pressing enter and messages are cut off on right hand side - likely not be Linux specific either but nobody else was complaining about that one.
Proton 5.13-6