[nurino]

Can you install and run this without Steam?

I already use wine-d3d9 which is very good for WoW but as its name says it doesn't run DX11/12 games.

[shmerl]

You don't need Proton without Steam (since it has various Steam specific stuff), but yes, you can.

See here for example: https://www.gog.com/forum/general/adamhms_linux_wine_wrapper...

However, you can simply use upstream Wine with add-ons like dxvk[1] (which is used in Proton).

Using esync[2] (also utilized by Proton) requires special branch of Wine, since it's not going to be upstreamed and it's not as simple as installing dll overrides.

1. https://github.com/doitsujin/dxvk

2. https://github.com/zfigura/wine/blob/esync-rebased/README.es...

[folknor]

Do yourself a favor and check out https://lutris.net/games/world-of-warcraft/

Lutris is excellent for getting many games up and running, and WoW runs much better with dx11+dxvk than wine-d3d9.