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
Early access this model is "Minecraft". The game's development began in 2009 by Markus Persson initially for internet browsers that he developed alongside his full-time job. The alpha-version game proved popular enough that within the month of release, Persson added a means by which players could pay 10 euros (approximately 15) to access the game, allowing him to continue its development. As sales of the game increased, he was able to quit his job about eight months later to work on the game full-time, founding Mojang to bring on a larger development team. "Minecraft" continued to offer early access throughout its development