| 2024-05-06 |  1 Year Calm Coastline Records @ Calm Coastline Records @ 2024-05-06 | 4 | Organic House / Downtempo | Simon Firth - Mercury (Original Mix)5:41 | |
| 2023-09-15 |  Fragments @ Mirabilis Records @ 2023-09-01 | 1 | Progressive House | Simon Firth - Fragments (Original Mix)7:40 | |
| 2023-09-15 | Fragments @ Mirabilis Records @ 2023-09-01 | 2 | Progressive House | Simon Firth - Delta City (Original Mix)7:25 | |
| 2023-07-14 |  Mercury @ Calm Coastline Records @ 2023-07-14 | 1 | Organic House / Downtempo | Simon Firth - Mercury (Original Mix)5:41 | |
| 2023-07-14 | Mercury @ Calm Coastline Records @ 2023-07-14 | 2 | Organic House / Downtempo | Simon Firth - Blind Side (Original Mix)5:29 | |
| 2023-04-08 |  Two Years Anniversary @ Ardigital Records @ 2023-04-07 | 10 | Progressive House | Simon Firth - Repeater (Original Mix)8:27 | |
| 2023-01-10 |  INU Musika - the Yearbook 2022 - CD2 - Compiled by Gav Easby @ INU Musika @ 2023-01-10 | 6 | Progressive House | Simon Firth - Two in One (Original Mix)7:29 | |
| 2022-01-28 |  Two in One @ INU Musika @ 2022-01-28 | 1 | Progressive House | Simon Firth - Two in One (Original Mix)7:29 | |
| 2022-01-07 |  Selected 2021 @ Ardigital Records @ 2022-01-07 | 15 | Progressive House | Simon Firth - Spacemen (Original Mix)8:39 | |
| 2021-09-30 |  Spacemen @ Ardigital Records @ 2021-09-30 | 1 | Progressive House | Simon Firth - Spacemen (Original Mix)8:39 | |
| 2021-09-30 | Spacemen @ Ardigital Records @ 2021-09-30 | 2 | Progressive House | Simon Firth - Repeater (Original Mix)8:27 | |
| 2021-09-30 | Spacemen @ Ardigital Records @ 2021-09-30 | 3 | Progressive House | Simon Firth - Kaos (Original Mix)7:24 | |
| 2021-07-15 |  Cosmic Dust @ Mirabilis Records @ 2021-06-25 | 1 | Progressive House | Simon Firth - Cosmic Dust (Original Mix)7:25 | |
| 2021-07-15 | Cosmic Dust @ Mirabilis Records @ 2021-06-25 | 2 | Progressive House | Simon Firth - Shimmer (Original Mix)6:29 | |
| 2020-09-07 |  Haunted / Luminiferous Ether @ Soulfire Downloads @ 2020-08-20 | 1 | Progressive House | Simon Firth - Haunted (Original Mix)7:50 | |
| 2020-09-07 | Haunted / Luminiferous Ether @ Soulfire Downloads @ 2020-08-20 | 2 | Progressive House | Simon Firth - Luminiferous Ether (Original Mix)8:13 | |
| 2018-12-07 |  10th Anniversary (Celebrating) @ Four Peas Recordings @ 2018-12-06 | 12 | Progressive House | Simon Firth - Mambo (Original Mix)9:24 | |
| 2018-08-31 |  Basement Traxx, Vol. 3 @ Various Files Records @ 2018-08-17 | 15 | Indie Dance | Simon Firth - Domino Effect (Amezquita Remix)7:25 | |
| 2015-10-19 |  Domino Effect / V4 @ Mirabilis Records @ 2015-10-19 | 1 | Progressive House | Simon Firth - Domino Effect (Original Mix)7:44 | |
| 2015-10-19 | Domino Effect / V4 @ Mirabilis Records @ 2015-10-19 | 2 | Progressive House | Simon Firth - Domino Effect (Amezquita Remix)7:25 | |
| 2015-10-19 | Domino Effect / V4 @ Mirabilis Records @ 2015-10-19 | 3 | Progressive House | Simon Firth - Domino Effect (K.O.L.O. & Puly Remix)7:07 | |
| 2015-10-19 | Domino Effect / V4 @ Mirabilis Records @ 2015-10-19 | 4 | Progressive House | Simon Firth - V4 (Original Mix)7:07 | |
| 2015-10-19 | Domino Effect / V4 @ Mirabilis Records @ 2015-10-19 | 5 | Progressive House | Simon Firth - V4 (Kultrun 1991 Remix)9:28 | |
| 2015-10-19 | Domino Effect / V4 @ Mirabilis Records @ 2015-10-19 | 6 | Progressive House | Simon Firth - V4 (Kultrun 1994 Remix)9:15 | |