Portal 2 - Want You Gone

Jonathan Coulton's song "Still Alive", which is sung by GLaDOS (voiced by Ellen McLain) over Portal's end credits, was considered a large part of Portal's success; in designing Portal 2, Valve desired to incorporate more music into the game, including further involvement from Coulton.

Coulton wrote the lyrics and composed the song over the course of several days, with John Flansburgh assisting on electronic drums, and traveled to Valve's headquarters in January 2011 to record it with McLain. Ultimately the game's finale, where GLaDOS effectively "breaks up" with Chell, was set by the last quarter of 2010, and Coulton played the game as it had been developed to that point to generate ideas.