The steam_api.dll file is not actually part of the game’s full graphics or audio. It is a small wrapper file created by Valve (the owner of Steam). Its only job is to tell the game, “Hey, you are a legitimate Steam copy.”
Open your antivirus (like Windows Defender) and check the "Protection History" or "Quarantine" section. If you find steam_api.dll , you can restore it and add the game's folder to your exclusions list to prevent it from being deleted again. download steamapidll resident evil 4 uhd full