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 apparently taking full ownership of the CraftBukkit modification, although the validity of this claim was questioned due to its status as an open-source project with many contributors, licensed under the GNU General Public License and Lesser General Public License. On 15 September 2014, Microsoft announced a $2.5 billion deal to buy Mojang, along with the ownership of the "Minecraft" intellectual property. The deal was suggested by Persson when he posted a tweet asking a corporation to buy his share of the game after receiving criticism for "trying to do the right thing". It was completed on 6 November 2014, and