Bottles, a free and open source application for Linux (that works well on the Steam Deck), has another new release out bringing in major new features.
Since a previous version, it came with support for pre-configured environments (Gaming and Applications), which has been massively extended in version 2022.3.28. Now, you can setup your own configuration and share these environments with others, so in a way it's sliding closer to some capabilities of Lutris. These environments are configured with a YAML file making them easy to parse and read.
On top of that, there's improved support for Steam Play Proton directly. It's under heavy development and still experimental but Bottles can now read Steam Launch Options for games installed via Proton and deal with them in Bottles directly and configure certain settings in Bottles. This eventually might make it far easier than manually editing Steam launch options.
This release also brings a command-line environment for Bottles too, amongst other things.