| 2025-02-22 |  The Nostalgic Soundtrack @ Retrolounge Records @ 2025-02-21 | 1 | Organic House | Efrem, Constantin John - The Nostalgic Soundtrack (Original Mix)7:13 | |
| 2023-09-29 |  Ethereal @ Retrolounge Records @ 2023-09-29 | 1 | Deep House | Efrem - Ethereal (Original Mix)5:25 | |
| 2023-09-29 | Ethereal @ Retrolounge Records @ 2023-09-29 | 2 | House | Efrem - Ethereal (Dino MFU Remix)6:15 | |
| 2023-09-29 | Ethereal @ Retrolounge Records @ 2023-09-29 | 3 | Afro House | Efrem - Ethereal (Christos Fourkis Remix)7:02 | |