As a teenager he sang in the local church choir, and was briefly a singer in a band established by his friends in high school. He also taught himself to play the guitar and bass guitar. He began learning music through the violin as child, and later received classical piano lessons for about seven years. Simon Wiklund was born in Stockholm on December 1, 1979. In 2016, he joined 10 Chambers Collective, another company founded by Ulf Andersson, while continuing his freelance projects. Viklund left Overkill in 2015 to become a freelancer.

Grin went bankrupt in 2009, leading Viklund, Ulf Andersson and his brother Bo to found Overkill Software. In 2000, Viklund joined his friend Ulf Andersson's company, Grin, and worked on most of the company's games, which included Bionic Commando: Rearmed. He is also known for his work on the Payday series as a composer and the voice of the character Bain. Simon Viklund (born Simon Wiklund, December 1, 1979) is a Swedish freelance video game composer, music producer, sound designer and game designer, who was first known for his work on the 2008 game Bionic Commando Rearmed, in which he was a creative director and composer.

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