Because the game is no longer sold or supported by Activision, many gaming communities classify it as "abandonware."

Obtaining a "free download" of Spider-Man: Web of Shadows is complicated because the game was from digital storefronts in January 2014 due to expired licensing . It is no longer available for purchase or legal download through platforms like Steam, the PlayStation Store, or Xbox Live. Status and Legality Spider-Man Web of Shadows Free Download

Since you cannot download it from official stores, you have two primary options: Because the game is no longer sold or

While some sites offer "free" versions, these are often unofficial and can pose security risks. the PlayStation Store