| Name | Artist | type | Label | Language | firstreleasedate | Average Rating | Type | Review |
|---|---|---|---|---|---|---|---|---|
| Opus Posthumum | Mathias Grassow | Album | GS Productions | English | 2014/2/3 | 0.0 | Official | 0 |
| Opus Posthumum | Mathias Grassow and Guests | Album | Practising Nature | English | 2005/None/None | 0.0 | Official | 0 |
| Opus PosthumumMathias Grassow Bandcamp | Mathias Grassow | Album | [no label] | English | 2017/12/3 | 0.0 | Official | 0 |
| Opus Posthumum | Mathias Grassow and guests | Album | Practising Nature | - | 2006/None/None | 0.0 | Official | 0 |