Portal's Companion Cube has a Dark Secret

"Hello, internet. Welcome to GAME THEORY, determined to be the first show ever to talk about Portal without once mentioning cake. Wait, I just blew it, didn't I? Dammit!"

- MatPat

Portal's Companion Cube has a Dark Secret (subtitled The Cube's SECRET) is the 47th episode of Game Theory on The Game Theorists.

Description
''Portal's Companion Cube is perhaps one of gaming's most memorable and lovable characters (items?). But is the Companion Cube another cruel test set up by GLaDOS? What sinister secret is hidden behind the Companion Cube's cute pink hearts? Like most other things in Portal, the cube may be more than meets the eye...''