With The 11th Hour •
The Burden of Grief (2009) •
Lacrima Mortis (2012)
With Arjen Anthony Lucassen •
Lost in the New Real (2012)
With Vuur •
In This Moment We Are Free – Cities (2017)
With Hail of Bullets •
…Of Frost and War (2008) •
On Divine Winds (2010) •
III: The Rommel Chronicles (2013)
With Elegy •
Labyrinth of Dreams (1992)
With Gorefest •
False (Nuclear Blast 1992) •
The Eindhoven Insanity (Nuclear Blast 1993) •
Erase (Nuclear Blast 1994) •
Fear EP (1994) •
Soul Survivor (Nuclear Blast 1996) •
Freedom EP (1996) •
Chapter 13 (SPV 1998) •
La Muerte (2005) •
Rise to Ruin (2007)
With Ayreon •
Into the Electric Castle (1998) •
Universal Migrator Part 2: Flight of the Migrator (2000) •
The Human Equation (InsideOut 2004) •
Actual Fantasy (Revisited) (InsideOut 2005) •
01011001 (2008) •
The Theory of Everything (2013) •
The Theater Equation (live, 2016) •
The Source (2017) •
Ayreon Universe – The Best of Ayreon Live (live, 2018) •
Electric Castle Live and Other Tales (live, 2020) •
01011001 – Live Beneath the Waves (live, 2024)
With The Gentle Storm •
The Diary (2015)
With Lana Lane •
Secrets of Astrology (2000)
With Star One •
Space Metal (InsideOut 2002) •
Live on Earth (InsideOut 2003) •
Victims of the Modern Age (InsideOut 2010) •
Revel in Time (InsideOut 2022)
Guest appearances With Love Like Blood •
Snakekiller (on 3 songs) (1998)
With Krezip •
Days Like This (2002) == References ==