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 as Java is known to be. However, Mojang developer Tommaso Checchi reassured fans on Reddit that modding was "too important" to "Minecraft" for the Java-based versions to be discontinued. Mojang released version 1.9 of "Minecraft" for the PC in early 2016, and with this update the company promised that the creation and updating of mods would be significantly simplified. Previous updates have been known to break available mods, forcing creators to spend considerable time updating them. In April 2017, Mojang announced the upcoming creation of a so-called "Minecraft Marketplace", where players would be able to sell user-created content for the