Wiklund joined Grin in 2000 and acted as a composer and sound designer on most of the company's projects, starting with its first game, Ballistics.

[7] Viklund was also involved in developing the PC version of Tom Clancy's Ghost Recon Advanced Warfighter (2006) and its 2007 sequel, which were published by Ubisoft.

[8] He subsequently led the development of Bionic Commando Rearmed, a remake of the 1988 NES version commissioned by Capcom;[6] Viklund also composed the game's soundtrack, which was praised for its faithful reimagining of the original 8-bit arrangements.

[12] Viklund began work on Bionic Commando Rearmed 2 as its creative director in 2009, before Grin went bankrupt four months into its development.

[6] He was also commissioned by Capcom for Final Fight: Double Impact (2010) and Street Fighter III: 3rd Strike Online Edition (2011), for which he composed the music.

[15] At Overkill, he served as the creative director and sound designer for the company's first game, Payday: The Heist, and also composed its soundtrack, drawing inspiration from the 1995 crime film Heat.

"[11] In Ballistics and Bandits: Phoenix Rising, he cited the Quake III soundtrack, Fatboy Slim, and The Chemical Brothers as inspirations for the rock, techno, big beat, and industrial sound.

[6][27] In 2013, for Payday 2, he moved on to using Ableton Live, supplemented with a Native Instruments Komplete keyboard and the reFX Nexus 2 Synthesizer plug-in.