I've tried the report suggestions provided by others but the game simply won't run. I've got the XLive DLL file in the right place, have edited both the installscript and systemreg files, killed wineserver and tried the following Proton versions:

-Experimental

-8.0-3

-7.0-6

-6-3.8

The results vary from the game STILL trying to install GFWL (despite tweaks in both of the mentioned files and having the XLive DLL) to being in a "Playing" state where a window never appears and Steam warns me of data loss when eventually closing it.