If you want to experience the series safely, you should stick to official platforms for the existing titles: Prototype (2009) and Prototype 2 (2012)
How to stay safe and find legitimate Prototype-related content Prototype 3 Free Download Pc Game Full Version
Torrenting Prototype or Prototype 2 is also illegal. These games are still under copyright protection. If you want to experience the series safely,
Scammers often name unrelated files as "Prototype 3 Setup.exe." The actual content could be: Prototype 3 Free Download Pc Game Full Version
(Remastered collection for consoles) Why the Series is Dormant