Portal 2: A Critical Analysis of Game Design

GLaDOS - Portal Wiki

Portal 2 Game Audio Analysis

PlayStation Portal Teardown Video Reveals Underpowered Chip, Bad Repairability and More

Opinion to Portal 2: introduction and analysis – Cotter Chronicle

Behind the Movement to Create More Black Video Game Characters - The New York Times

PlayStation Portal review: weird but comfortable PS5 remote play - Video Games on Sports Illustrated

The Art of Portal 2

Opening The Portal: Exploring The Game's Development - Game Informer

Portal 2 and transfer of learning in playful environments – Shashank Pawar