The error "steam_api64.dll is missing" is a classic headache for Infinite Warfare players. It usually happens because antivirus software flags the file as a "false positive" and deletes it, or the game files simply didn't download correctly.
Add your Infinite Warfare game folder to your antivirus "Exclusions" list so it doesn't happen again. 3. Reinstall DirectX and Visual C++ call of duty infinite warfare steamapi64rdll missing work
Steam has a built-in tool that compares every file on your hard drive to the master copy on their servers. If steamapi64r.dll is missing, Steam will replace it automatically. The error "steam_api64