Album was composed by Maciej Biedrzycki / Paweł Błaszczak / Szymon Chybalski and was released on December 13, 2018. Soundtrack consists of 18 tracks tracks with duration over about 40 minutes. Album was released by Thing Trunk.
CD 1
| 1 | Return 2 Games Intro | 00:42 | |
| 2 | Return 2 Games Main Theme | 01:36 | |
| 3 | Book of Demons Intro | 01:19 | |
| 4 | Book of Demons Town Theme | 03:06 | |
| 5 | Book of Demons Maze Theme | 04:27 | |
| 6 | Book of Demons Catacombs Theme | 04:41 | |
| 7 | Book of Demons Hell Theme | 04:47 | |
| 8 | Book of Demons Hell Battle Music | 03:19 | |
| 9 | Book of Demons Incantation Theme | 00:38 | |
| 10 | Book of Demons Antipope Incantation | 00:37 | |
| 11 | Book of Demons Cook Incantation | 00:44 | |
| 12 | Book of Demons Archdemon Incantation | 00:42 | |
| 13 | Book of Demons Archdemon Dies (outro) | 00:26 | |
| 14 | Book of Demons Die, Demons Die Song | 02:35 | |
| 15 | Book of Demons Die, Demons Die Song (Karaoke) | 02:35 | |
| 16 | Book of Demons Die, Demons Die Song (alternate ending) | 02:35 | |
| 17 | Book of Demons Reveal Trailer Music | 01:48 | |
| 18 | Book of Demons R2G Main Theme (performed live by $99 Orchestra) | 01:32 | |
