What sentence found in Ratman dens became a Portal internet meme?

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What sentence found in Ratman dens became a Portal internet meme? “The cake is a lie” became the famous Portal meme.

The phrase appears as graffiti in hidden areas of the Aperture Science facility. Doug Rattmann wrote it as a warning that GLaDOS’s promise of cake was not a genuine reward. GLaDOS tells Chell that completing the test chambers will earn her cake, but the promise is part of the manipulation used to keep her moving through increasingly dangerous tests.

The sentence became one of the most recognizable lines associated with Portal after the game’s 2007 release. It works both as an in-game plot clue and as a broader expression for a promised reward that will never arrive. The phrase is also referenced in “Still Alive,” the end-credits song written by Jonathan Coulton and performed by Ellen McLain as GLaDOS.

Readers sometimes associate the line primarily with Portal 2, but its original appearance is in the first Portal. Portal 2 includes later callbacks, while the graffiti and Ratman dens establish the phrase’s original meaning.

Source: Wikipedia · fact-checked Sept. 2026

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