Million Onion Hotel Soundtrack Side1
| Composed by | Hirofumi Taniguchi |
| Published by | Onion Games |
| Release type | Game Soundtrack - Official Release |
| Format | 1 Digital - 15 tracks |
| Release date | January 27, 2018 |
| Duration | 00:26:39 |
| Genres |
| 1 | Logo Jingle | 00:07 | |
| 2 | Dr. Peace's Retro World | 01:58 | |
| 3 | The Land of Bingo the State of Bingo | 03:34 | |
| 4 | Onion Time: Onion Soup | 00:24 | |
| 5 | Song of the Universe: Pt. 1 | 01:24 | |
| 6 | Black Hole -Hikkuri Appears!- | 03:44 | |
| 7 | Onion Time: Lover Lover | 00:25 | |
| 8 | Song of the Universe: Pt. 2 | 01:24 | |
| 9 | Black Hole -Yasuda Arrives!- | 04:06 | |
| 10 | Bye-Bye When the Battery Dies | 00:07 | |
| 11 | Onion Time: Mafia Wars | 00:33 | |
| 12 | Song of the Universe: Pt. 3 | 01:24 | |
| 13 | Black Hole Hikkuri Returns Mk2- | 03:37 | |
| 14 | Onion Time: Heart Trap | 00:39 | |
| 15 | A Hill With a Visible Cog | 03:13 |
