Portal 2 was released by Valve in 2011 as the sequel to Portal, following Chell through the ruined Aperture Science facility guided by Wheatley and opposed by GLaDOS. Cave Johnson never appears alive, instead appearing through decades of pre-recorded messages that explain Aperture's history and his increasingly reckless attitude toward testing and safety. Played by J.K. Simmons, those recordings became some of the game's most quoted material online, shared by fans as standalone reactions for blind confidence, bad inventions and corporate nonsense presented as visionary science.