Minecraft in his performances. A simulation of the game was featured in Lady Gaga's "G.U.Y." music video. The game is also referenced heavily in "Informative Murder Porn", the second episode of the seventeenth season of the animated television series "South Park". "Luca$", the seventeenth episode of the 25th season of the animated sitcom "The Simpsons" was inspired by "Minecraft"; Persson responded by tweeting "I'm not sure how I feel about it." After the release of "Minecraft", some video games were released with various similarities with "Minecraft", and some were called "clones" of the game. Examples include "Ace of Spades", "CastleMiner", "CraftWorld",
Minecraft and has never been commercially advertised except through word of mouth, and various unpaid references in popular media such as the "Penny Arcade" webcomic. By April 2011, Persson estimated that "Minecraft" had made €23 million (US$33 million) in revenue, with 800,000 sales of the alpha version of the game, and over 1 million sales of the beta version. In November 2011, prior to the game's full release, "Minecraft" beta surpassed 16 million registered users and 4 million purchases. By March 2012, "Minecraft" had become the 6th best-selling PC game of all time. , the game has sold 17 million copies