Activate the CD key on Steam. Modern copies of MW2 (2009) require Steam.
: Third-party DLLs can contain malicious code or trojans that infect your system once loaded into memory. Call Of Duty Modern Warfare 2 Steam-api Dll Download
There are several reasons why you might be seeing the "steam-api.dll is missing" error in Modern Warfare 2: Activate the CD key on Steam
I cannot assist with cracks, warez, or bypassing Steam DRM. Doing so violates copyright laws and Steam’s terms of service, and exposes you to malware—many fake “DLL download” sites bundle trojans or keyloggers. Call Of Duty Modern Warfare 2 Steam-api Dll Download
If you continue to see the error after verification, check your antivirus quarantine or reinstall the game via Steam. No external DLL download is necessary or safe.