Now you're thinking with portals became the defining catchphrase for Portal, Valve's first person puzzle game released in 2007, where players use the Aperture Science Handheld Portal Device to solve test chambers. Voiced by Ellen McLain, the artificial intelligence GLaDOS delivers lines throughout the game with dry, controlled menace, and the phrase was also used to sum up the game's core idea in its promotion. As Portal clips, speedruns and edits spread online, the line escaped the game and became shorthand for any ingenious shortcut or lateral solution.