Running Development Clients on Linux ¶

Prerequisites ¶

To run the development version of the game via Proton, the default launch command used by Steam needs to be modified. For this we need to create a shim that will strip the default parameters passed to Red Orchestra executable and allow us to replace them with our own.

Navigate to Darkest Hour: Europe '44-'45 properties in the Steam library and add the line below to Launch Options.

exe=RedOrchestraLargeAddressAware.exe; cmd=$(sed -re "s/$exe('?) .*'?--'? /$exe\1 /" -e "s/ '?--multi'?//g" <<< "%command%"); [[ "%command%" == *"--multi"* ]] && { exe0=${exe/.exe/_0.exe}; cp -up System/$exe System/$exe0; cmd="${cmd//waitforexitandrun/run}"; eval "$cmd & ${cmd/$exe/$exe0}"; } || eval "$cmd"

Running the client ¶

Once the shim is in place, launching the game from Steam GUI or via command line (without any external parameters) will behave as usual and run the non-development version of the game.

steam -applaunch 1280 # launches non-development client

To override the default behavior, we can launch the game via Steam CLI and append -- to the command, followed by our own options.

steam -applaunch 1280 -- -mod=DarkestHourDev # launches dev client

Examples ¶

steam -applaunch 1280 -- 127.0.0.1 -mod=DarkestHourDev # launch dev client and connect to a local server

steam -applaunch 1280 -- DH-Target_Range.rom?quickstart=true -mod=DarkestHourDev -log # launch dev client on Target Range and show log window

Running two clients with --multi ¶

The shim we added to the launch options implements a --multi parameter; when used, it will launch two clients simultaneously.

steam -applaunch 1280 -- 127.0.0.1 -mod=DarkestHourDev --multi # run and connect two dev clients to a local server