Copy LumaEmu.ini, steamclient64.dll, LumaGameLauncher_x64.exe and LumaGameLauncher_x64.dll to the game folder.
2. Change the "SteamClientDll64" path in LumaEmu.ini.
3. Create steam_appid.txt with the correct AppID for the game.
4. (1) Start LumaGameLauncher_x64.exe and type in the game's exe name and parameters if you use any and press "Launch!".
4. (2) Type in the game's exe name and parameters in the "LumaGameLauncher" section of LumaEmu.ini.
5. Start the game with LumaGameLauncher_x64.exe