"In this series, I hope to tear apart a series of games. Spoiler alert throughout. I think first I’d like to cover the Portal series, touching upon Half Life (which occurs in the same time line) and just what Valve does to make you feel for the characters you interact with. They have a strange habit of keeping the two protagonists, Chell and Gordon Freeman, entirely mute throughout the course of the series. Although from a gameplay perspective this is usually a better take in this particular genre, it works neatly into the narrative too."
Joel from That Gamer Hub