I have tried following FAQ guide for playing FAF offline, here: https://forum.faforever.com/topic/4702/how-to-play-the-supreme-commander-campaign-offline-and-coop-maps
But the command line switch "/init init_coop.lua" doesn't seem to work anymore with the latest versions of FAF, it looks like the "init_coop.lua" file no longer exists in the BIN directory. Does anyone know how to play FAF offline line now or what the updated command is?