The file steamclient64.dll is a critical 64-bit dynamic link library used by the to handle core functions like connection management, inter-process communication, and Steamworks SDK features for games.
Go to your main Steam install (usually C:\Program Files (x86)\Steam ). Copy Files: Find steamclient64.dll and tier0_s64.dll . steamclient64.dll
Crash seemingly related to Fake IP feature · Issue #350 - GitHub The file steamclient64
If your game or Steam client won't launch because of this file, use these standard repairs: Crash seemingly related to Fake IP feature ·
Right-click your game in the Steam Library > Properties > Installed Files > Verify integrity of game files .
If the file is missing from the main Steam directory, downloading a fresh installer from Steam Support and running it over your current installation can repair the core files.
Place them in your dedicated server's binary folder (e.g., .\Binaries\Win64\ for many Unreal Engine games).