Portal: Forbidden Testing Tracks

Portal: Forbidden Testing Tracks invites you to delve into an exciting community-created modification for Portal 2. Step into the shoes of Rachel as she embarks on a journey guided by the personality core named "SAIC," through the Forbidden Testing Track, Codename: "Quebeck Seven." 

https://store.steampowered.com/app/1636310/Portal_Forbidden_Testing_Tracks/
http://www.pftt.online