Million Onion Hotel Official Soundtrack
| Composed by | Hirofumi Taniguchi |
| Published by | Onion Games |
| Release type | Game Soundtrack - Promo / Enclosure |
| Format | 1 CD - 6 tracks |
| Release date | January 27, 2018 |
| Genres |
Sold at the Onion Music Festival 2018 event held on January 27, 2018 at Akihabara Club Goodman.
| 1 | ロゴ・ ジングル | ||
| 2 | ピース博士のレトロな世界 | ||
| 3 | BINGOの国 備後の国 | ||
| 4 | ONION TIME:Onion Soup | ||
| 5 | 宇宙の歌part1 | ||
| 6 | Blackhole〜出たな！ヒックリさん |
