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 mods owners more control over their "Minecraft" environments. With the release of the alpha version, the first client-side mods began to appear; these added relatively simple things, like other textures or amendments to the in-game compass. Towards the end of 2010, new mods were released which featured more content than previous ones. "Minecraft" was now preparing to move into its beta development phase, and popular mods such as "IndustrialCraft", "Railcraft" and "BuildCraft" were first released to the public. As opposed to their predecessors, these mods had the potential to change the entire game instead of simply tweaking minor aspects of it.