Today Valve released the next major version of Proton: Proton 5.0.

You can install it manually by using the command

steam steam://install/1245040

You can also install it via the library in the Steam Client (in the Tools section).

Proton 5.0-1

Update Wine to version 5.0. Since the last major release of Proton, Wine has seen over 3500 changes, which are now integrated into Proton. 207 patches from Proton 4.11 were either upstreamed or are no longer needed.

Direct3D 9 games will now use DXVK for rendering by default. Users without Vulkan support can return to the OpenGL-based wined3d renderer with the PROTON_USE_WINED3D configuration option.

Improved Steam client integration. This makes more games that use Denuvo playable, including Just Cause 3, Batman: Arkham Knight, Abzu, and more.

New Proton environments will report a newer OS version, which some newer games require. Existing environments will not be changed automatically.

Wine 5.0 includes the beginnings of real multi-monitor support. Expect major improvements in this area soon.

Improved surround sound support for older games.

Update DXVK to v1.5.4.

Update FAudio to 20.02.

Note for users who build Proton: this branch has new submodules, please be sure to git submodule update --init.

More information:

https://github.com/ValveSoftware/Proton/releases/tag/proton-5.0-1
https://steamdb.info/app/1245040/