| 2021-01-01 |  The Best Of Observatory Music @ Observatory Music @ 2021-01-01 | 2 | Tech House | Piem - Journey (Original Mix)6:19 | |
| 2020-04-11 |  Journey @ Observatory Music @ 2020-03-27 | 1 | Tech House | Piem - Journey (Original Mix)6:19 | |
| 2020-04-11 | Journey @ Observatory Music @ 2020-03-27 | 2 | Tech House | Piem - Journey (M.F.S: Observatory Remix)5:50 | |
| 2020-04-11 | Journey @ Observatory Music @ 2020-03-27 | 3 | Minimal / Deep Tech | Piem - Journey (RYBO Remix)7:08 | |