This is the #1 cause. Many antivirus programs flag .dll files as "low-reputation" or "heuristic" threats and automatically quarantine or delete them.
Below is a comprehensive guide on what this file does and the safest ways to get your game back up and running. What is Steam_api.dll? download steam apidll for resident evil 6 pc new
Over time, Windows registry entries pointing to the file can become broken. How to Fix "Steam_api.dll Missing" for Resident Evil 6 Method 1: Verify Integrity of Game Files (Recommended) This is the #1 cause