| ID | Interpret | Skladba | Album | |
| 181. | In The Nursery | Iskra [PREVIEW] | Prelude 1983-1985 |  |
| 182. | In The Nursery | Remain [PREVIEW] | Prelude 1983-1985 | |
| 183. | In The Nursery | Deus ex Machine [PREVIEW] | Prelude 1983-1985 | |
| 184. | ERH | Atmosphere 2 | Portal: Prelude Soundtrack | |
| 185. | ERH | Atmosphere String 2 | Portal: Prelude Soundtrack | |
| 186. | ERH | C2R B2 1B Strings | Portal: Prelude Soundtrack | |
| 187. | In The Nursery | Stone Souls [PREVIEW] | Prelude 1983-1985 | |
| 188. | ERH | Atmosphere 4 | Portal: Prelude Soundtrack | |
| 189. | ERH | Atmosphere 1 | Portal: Prelude Soundtrack | |
| 190. | ERH | Atmosphere 2 | Portal: Prelude Soundtrack | |
| 191. | ERH | Swell Pad | Portal: Prelude Soundtrack | |
| 192. | ERH | Discovering GlaDOS | Portal: Prelude Soundtrack | |
| 193. | In The Nursery | A to I [PREVIEW] | Prelude 1983-1985 | |
| 194. | In The Nursery | Sentient [PREVIEW] | Prelude 1983-1985 | |
| 195. | In The Nursery | Sentient [PREVIEW] | Prelude 1983-1985 | |
| 196. | In The Nursery | Lost Prayer [PREVIEW] | Prelude 1983-1985 | |
| 197. | Silence | Larmes | Portal: Prelude Soundtrack |  |
| 198. | ERH | ABS O5 120 Harp | Portal: Prelude Soundtrack | |
| 199. | Silence | Particule | Portal: Prelude Soundtrack | |
| 200. | ERH | C2R B2 1B Strings | Portal: Prelude Soundtrack | |
