Minecraft led to Persson becoming one of "Forbes" "World's Billionaires". "Minecraft"s music and sound effects were produced by German musician Daniel Rosenfeld, better known as C418. The background music in "Minecraft" is instrumental ambient music. On 4 March 2011, Rosenfeld released a soundtrack, titled "Minecraft – Volume Alpha"; it includes most of the tracks featured in "Minecraft", as well as other music not featured in the game. The video game blog Kotaku chose the music in "Minecraft" as one of the best video game soundtracks of 2011. On 9 November 2013, Rosenfeld released the second official soundtrack, titled "Minecraft – Volume
Minecraft mods a repository for "Minecraft" mods. Their help website lists video tutorials that teach the player how to install and play "Minecraft" mods. "Minecraft"s creator Markus Persson admitted in 2012 that he was initially skeptical of mods, fearing that the usermade content would threaten his vision for the game. Persson says he came around, as he claims to have realized that mods are "a huge reason of what "Minecraft" is". In some cases, authors of mods even ended up getting a job at Mojang. In 2016, Mojang announced their official support for mods on the mobile and console versions of Minecraft