Into the Breach on OS X with Wine

2018-02-28 159 words One minute

Requirements

That’s right. You only need to download Wineskin.

Download and install Wineskin
Run Wineskin, download the latest engine (I’ve used WS9Wine2.22)
Select “Create New Blank Wrapper”
When it finishes creating the wrapper, right click on the wrapper icon and select “Show Contents”
Double click on Wineskin (note: this is the Wineskin configuration tool; it’s different from the “main” Wineskin Winery executable)
Select “Advanced”, “Tools”, “Winetricks”
Search “steam” and install it
When it finishes installing Steam, click “Test Run” in the “Tools” window of Wineskin
Let Steam complete its installation by downloading all the updates
Exit Steam when the update is completed; do not run Steam after the installation is completed.
Go back to Finder, go to the window containing your wrapper (i.e. the directory that contains the Wineskin configuration tool); double click on your wrapper to launch it.
Log In into Steam
Install Into the Breach
Enjoy :)

Or check this more detailed guide on reddit.