Proton

[Dog@0401]

Bought RDR2 through Steam & it was fine using 'Proton Experimental' for two days, now after an update it fails to start. Tried the other Proton options but no go, 'Proton Hotfix' worked for one day but not anymore. Tried some of the recent suggestions on Proton DB but still no luck. Seems to start loading the 'Rockstar launcher' then simply stops, no error codes. Running Linux Mint Debian Edition 5, NVIDIA 1660 Super. Not sure what I'm missing so hoping for some tips. Many Thanks.

[Key]

I remember when I started to use Proton on Linux Mint, it was pretty unstable. Then I switched to Manjaro Gnome; it worked much better. Even Shadow of Mordor works flawlessly.
Rolling release is probably beneficial, because you can update to newer versions, without the need to wait for months. Especially Wayland (GNOME defaults to this) helps for gaming (see https://en.wikipedia.org/wiki/Wayland_(display_server_protocol) ).
If you don't want to try it on another hard drive, I would recommend switching kernels. Which one are you using? Aren't there any log files about the crash?
Other people recommended launch options: https://www.protondb.com/app/1174180

[Mouse of Madness]

If you go into properties and under compatibility tell it to force a different version, you can generally get games to work that Experimental keeps breaking. I'm running Debian without the extra Mint stuff, and Proton Next (7.0-5) seems to work so far

[TheIcefinity]

Originally posted by Dog@0401:

Bought RDR2 through Steam & it was fine using 'Proton Experimental' for two days, now after an update it fails to start. Tried the other Proton options but no go, 'Proton Hotfix' worked for one day but not anymore. Tried some of the recent suggestions on Proton DB but still no luck. Seems to start loading the 'Rockstar launcher' then simply stops, no error codes. Running Linux Mint Debian Edition 5, NVIDIA 1660 Super. Not sure what I'm missing so hoping for some tips. Many Thanks.

I am in the same boat as you.
It doesn't work because of social club / rockstar launcher.
I also have GTA 5 and I can't run that either , same problem (even though I played it for more than 800 hours untill now).
It's nothing you can do about it.
You have to wait for either rockstar to update the launcher or proton to update itself.
Either way it happens when you have linux and use proton/wine and games have an external launcher (EA , ubisoft , rockstar etc).
Happened to me with NFS Heat a few days ago.
Couldn't play and now after an update I can play it again.

As a linux user you must buy only steamOS games or games that don't have external launchers.
Because sooner or later , you will have a launcher problem or internet problem and you won't be able to play the games you paid for , for days or weeks.