Uninstall Infinite Warfare completely.
steam_api64.dll is not just a file; it requires supporting Visual C++ runtimes. A broken VC++ install can trigger DLL errors. call of duty infinite warfare steamapi64rdll missing work
Steam can automatically detect and replace missing or corrupted DLL files. Uninstall Infinite Warfare completely
steam_api64.dll is a critical file provided by Steam. It acts as the bridge between your game and the Steam client, handling: steam_api64
If this file is missing, blocked, or corrupted, Call of Duty: Infinite Warfare will fail to launch and display an error message.
Believe it or not, a corrupt Windows system file can prevent 3rd-party DLLs from loading.