The is a critical Dynamic Link Library file developed by Valve Corporation as part of the Steamworks API . For players of Call of Duty: Modern Warfare 2 (both the original 2009 version and the 2022 remake), this file acts as a bridge between the game and the Steam client, enabling essential features like user authentication , multiplayer matchmaking , achievements , and Valve Anti-Cheat (VAC) functionality. Common Causes of the steam-api.dll Error
Understanding steam_api.dll in Call of Duty: Modern Warfare 2 steam_api.dll (or its 64-bit counterpart, steam_api64.dll Dynamic Link Library (DLL) steam-api.dll cod mw2
Antivirus programs (including Windows Defender) often flag these files as "false positives" and quarantine them, especially if they have been modified. steam-api