Systimatik is a United States-based metal band whose primary musical style combines Groove Metal, Nu Metal, and Metalcore.  The band's musical material was co-written by guitarist Rune and a musician known as Brother John, who passed away in 2017. Working from existing scratch tracks of their collaborations, Rune learned to play the guitar specifically to perform Brother John's riffs. The project was formed to reconstruct and record these songs in his honor.