| 1986 | At the Gates of Dawn | Mathias Grassow | | 3 |
| 1986 | Panta Rhei | Mathias Grassow | | 3 |
| 1987 | Atman | Mathias Grassow | | 3 |
| 1987 | Taoasis | Mathias Grassow | | 3 |
| 1988 | Behind the Evident Void | Mathias Grassow | | 3 |
| 1988 | Pipes of Peace | Mathias Grassow | | 3 |
| 1989 | On Silent Wings of Healing | Mathias Grassow | | 2 |
| 1989 | Temptations of Life | Mathias Grassow | | 3 |
| 1990 | Carmina Hildegardis | Mathias Grassow | | 3 |
| 1990 | el-HADRA: The Mystik Dance | Klaus Wiese, Ted de Jong & Mathias Grassow | | 7 |
| 1990 | The Hidden Treasure | Mathias Grassow | | 4 |
| 1991 | On Silent Wings of Healing II | Mathias Grassow | | 2 |
| 1991 | Prophecy | Mathias Grassow | | 3 |
| 1992 | Calm | Mathias Grassow | | 3 |
| 1992 | Psychic Dome | Mathias Grassow | | 3 |
| 1993 | In Search of Sanity | Mathias Grassow | | 2 |
| 1993 | Silent Lucidity | Mathias Grassow | | 3 |
| 1994 | Lifecycle | Mathias Grassow | | 1 |
| 1995 | Ambience | Mathias Grassow | | 1 |
| 1996 | Through Past in Future | Mathias Grassow | | 1 |
| 1997 | Arcanum | Mathias Grassow / Rüdiger Gleisberg / Amir Baghiri | | 2 |
| 1997 | Gates to Mystery | Mathias Grassow | | 1 |
| 1997 | Lanzarote-Spirits | Mathias Grassow | | 1 |
| 1998 | Namakar | Mathias Grassow | | 1 |
| 1998 | The Fountain of Remembrance | Mathias Grassow | | 1 |
| 1998 | True North | Amir Baghiri & Mathias Grassow | | 1 |
| 1998 | Awaken the Empire of Dark Wood | Mathias Grassow | | 1 |
| 1998 | Clear Light of Death | Mathias Grassow | | 3 |
| 1998 | Electric Bowls | Mathias Grassow | | 1 |
| 1998 | Elixir | Mathias Grassow | | 3 |
| 1998 | Mind Riders | Mathias Grassow | | 2 |
| 1998 | The Soil of Awareness | Mathias Grassow | | 1 |
| 1998 | Towards the Sound | Mathias Grassow | | 1 |
| 1998 | The Darklight Quest | Mathias Grassow | | 4 |
| 1998 | The Dreamquest-Sessions | Mathias Grassow | | 3 |
| 1998 | The Nightquest-Sessions | Mathias Grassow | | 1 |
| 1998 | The Voice of Mercurius | Mathias Grassow | | 1 |
| 1998 | Untitled Rooms | Mathias Grassow | | 1 |
| 1999 | Sphere | Mathias Grassow | | 1 |
| 1999 | Distant Light | Mathias Grassow | | 1 |
| 1999 | Dissolution | Mathias Grassow | | 3 |
| 1999 | Eclipse | Mathias Grassow | | 1 |
| 1999 | Emerald | Mathias Grassow | | 1 |
| 1999 | Himavat | Mathias Grassow | | 1 |
| 1999 | Himalaya | Mathias Grassow | | 2 |
| 1999 | Hidden Deep | Mathias Grassow | 5 | 2 |
| 1999 | Passion II | Mathias Grassow | | 1 |
| 1999 | Space | Mathias Grassow | | 1 |
| 1999 | Tiefweite Stille | Mathias Grassow | | 4 |
| 1999 | Thödol | Mathias Grassow | | 1 |
| 1999 | The Empty Sky | Mathias Grassow | | 1 |
| 2000 | Ambient Signum | Mathias Grassow | | 2 |
| 2000 | Apotheosis | Mathias Grassow | | 2 |
| 2000 | Bliss | Mathias Grassow | | 2 |
| 2000 | Collaborations | Mathias Grassow | | 1 |
| 2000 | Cosmic Chasm | Mathias Grassow, Klaus Wiese & Jim Cole | | 1 |
| 2000 | Individual Thought Patterns | Mathias Grassow | | 2 |
| 2000 | Morpheus | Mathias Grassow | | 2 |
| 2000 | Restless | Mathias Grassow | | 1 |
| 2000 | Sky | Mathias Grassow | | 2 |
| 2000 | The Fragrance of Eternal Roses | Mathias Grassow | | 3 |
| 2000 | The Gothic Passage | Mathias Grassow | | 3 |
| 2000 | The Spheres of Lucid Dreaming | Mathias Grassow | | 1 |
| 2001 | Equilibrium | Mathias Grassow | | 2 |
| 2001 | Mercurius | Mathias Grassow and Klaus Wiese | | 1 |
| 2001 | The OM-Drones | Mathias Grassow | | 1 |
| 2001 | The Hollow | Jim Cole & Mathias Grassow | | 2 |
| 2003 | Expanding Horizon | Alio Die & Mathias Grassow | | 1 |
| 2003 | Holy Domain | Mathias Grassow, Klaus Wiese & Carsten Agthe | | 1 |
| 2004 | Dharma | Mathias Grassow | | 2 |
| 2004 | The Last Bright Light | Jim Cole & Mathias Grassow | | 2 |
| 2005 | Aurora | Mathias Grassow & Siegmar Fricke | | 3 |
| 2005 | Dronament | Mathias Grassow and Guests | | 2 |
| 2005 | Opus Posthumum | Mathias Grassow and guests | 5 | 4 |
| 2005 | Opus Posthumum 2 | Mathias Grassow and Guests | | 3 |
| 2006 | Deep - Breath - Silence | Jim Cole & Mathias Grassow | | 2 |
| 2006 | Conscience | Mathias Grassow & Thomas Weiss | | 2 |
| 2006 | Fata Morgana | Mathias Grassow and Guests | | 2 |
| 2007 | Outland | Mathias Grassow & Thomas Weiss | | 2 |
| 2007 | Deeper Purity | Mathias Grassow | | 3 |
| 2007 | Insights | Mathias Grassow & Thomas Weiss | | 2 |
| 2008 | Ambessence Piano & Drones | Bruno Sanfilippo & Mathias Grassow | | 4 |
| 2008 | Inner Path | Mathias Grassow & Jiří Mazánek | | 2 |
| 2008 | Quiet Calling | Tomas Weiss & Mathias Grassow | | 4 |
| 2009 | Calibration | Mathias Grassow | | 3 |
| 2009 | Transpersonal | Mathias Grassow | | 2 |
| 2010 | Farewell: In Hommage to Klaus Wiese | Mathias Grassow & Tomas Weiss | | 3 |
| 2010 | CROMO [ piano & drones ] | Bruno Sanfilippo + Mathias Grassow | | 3 |
| 2010 | Aestrata | Tomas Weiss & Mathias Grassow | | 3 |
| 2010 | Electric Angels | Mathias Grassow & Tomas Weiss | | 5 |
| 2010 | Praha Meditations | Alio Die & Mathias Grassow | | 1 |
| 2010 | Quiet Calling II | Tomas Weiss & Mathias Grassow | | 3 |
| 2011 | 3rd Dimension | Mathias Grassow | | 1 |
| 2011 | Ornaments / 3rd Dimension | El Hadra / Mathias Grassow | | 1 |
| 2011 | Quiet Calling III | Tomas Weiss & Mathias Grassow | | 4 |
| 2011 | A-Childs-Colour-Play, Pt. 2 | Dissecting Table / Mathias Grassow & Tomas Weiss | | 1 |
| 2012 | Alchemystery | Mathias Grassow | | 2 |
| 2012 | Dämmerung | Mathias Grassow | | 3 |
| 2012 | Wisdom of Fate | Mathias Grassow | | 2 |
| 2012 | Bloodmoon | Mathias Grassow | | 3 |
