The file is a specific library file often associated with the "Rise of the Rajas" expansion for the game Age of Empires II: HD Edition . Errors mentioning this file usually occur because it is missing, corrupted, or has been quarantined by antivirus software. How to Fix the Missing File Error
A Google search for "Steam-apirajas.dll download" will likely lead you to sites like dll-files.com , fix4dll.com , or various obscure forums. Here is what happens if you download from them: Steam-apirajas.dll Download