the original .dll first by renaming it to something like steam_api64.dll.bak .
: Use a tool like 7-Zip or WinRAR to extract the .rar contents. _ [Goldberg] [HaxPC.net].rar
: Open your game's directory (usually in a bin or win64 folder) and find the original steam_api.dll or steam_api64.dll . Replace the DLL : the original