Finest ORIGINALS - A Brand New Start (2020)

Tobias Schmitz feat. Hagen Grohe - The Key (title song of the German TV show "Die Klempnerin") (2019)

21Octayne - "Lost" acoustic live @ NRW TV (Germany, 2015)

21Octayne - "When You Go" Official Music Video (2015)

21Octayne - "Devil In Disguise" Official Lyric Video (2015)

21Octayne - "Me Myself And I" acoustic live @ NRW TV (Germany, 2014)

21Octayne - "Into The Open" Official Tour Video (2014)

21Octayne - "Dear Friend" Official Music Video (2014)

21Octayne - "The Heart (Save Me)" Official Music Video (2013)

Herzlichter feat. Hagen Grohe - Heaven (Gotthard) (Germany, 2013)

The Joe Perry Project - Let The Music Do The Talking (USA, 2009)

The Joe Perry Project - Walking The Dog (with Slash) (USA, 2009)

The Joe Perry Project - Walk This Way (with Steven Tyler) (USA, 2009)

Joe Perry talks about Hagen (Japanese Interview) (USA, 2009)

Who's That Guy? - Hagen & The Joe Perry Project (USA, 2009)