Portal Guide

Characters & familiar faces

Chell

Playable test subject

The silent protagonist of Portal. Armed with a portal device, Chell navigates Aperture’s dangerous tests through observation and persistence.

GLaDOS

Aperture’s artificial intelligence

The voice directing Chell through the Enrichment Center. Her clinical instructions and dry humour make the testing programme increasingly unsettling.

Doug Rattmann

Unseen survivor

An Aperture scientist whose hidden dens and wall drawings leave clues about life behind the test chambers. The portrait comes from the companion comic Lab Rat.

Sentry Turrets

Aperture security

Soft-spoken automated guards that track movement with a laser and open fire when a target enters their sight. Shown in their Portal 2 design.

Weighted Companion Cube

Testing companion

A heart-marked puzzle object that helps hold down buttons and becomes an unlikely companion. Shown in its Portal 2 design.

Personality Cores

GLaDOS’s attachments

The original game features Morality, Curiosity, Intelligence and Anger cores attached to GLaDOS. The picture shows the Morality Core.

Character artwork © Valve. Image reference: Portal Guide. These are selected characters and familiar faces, rather than an exhaustive cast list.

Inside Aperture Science

Edition & image credits

The original 2007 Portal game by Valve. Screenshots on this page show the PC edition.

Artwork and screenshots © Valve. Images sourced from the . This is an independent fan reference.