What song plays over the closing credits of Portal?

“Still Alive” plays over the closing credits of Portal.

The song is performed in character by GLaDOS, voiced by Ellen McLain, and was written by Jonathan Coulton with Valve’s writing team. Its upbeat pop style and cheerful lyrics deliberately clash with the events of the game, in which the player appears to defeat GLaDOS after escaping the Aperture Science testing facility.

Rather than treating the ending as a straightforward defeat, the song reveals that GLaDOS has survived in some form and remains fixated on testing. That darkly comic reversal helped make the credits sequence unusually memorable for a puzzle game.

“Still Alive” is often confused with Portal 2 songs such as “Want You Gone,” which plays during Portal 2’s ending, or “Cara Mia Addio,” an opera associated with Portal 2. “Exile Vilify” is also from Portal 2, appearing as an optional in-game radio song.