If an update is available, let it install and restart Steam. 4. Reinstall the Game
If you are trying to launch Call of Duty: Modern Warfare 2 and receive an error stating that steam_api.dll is missing, corrupted, or not found, you are not alone. This is a common issue that prevents the game from communicating with the Steam client. Call Of Duty Modern Warfare 2 Steam-api Dll Download
