UNDER NIGHT IN-BIRTH ORIGINAL SOUNDTRACK
| Composed by | Raito |
| Published by | Wave Master |
| Catalog number | WMBM-0032 |
| Release type | Game Soundtrack - Official Release |
| Format | 1 CD - 28 tracks |
| Release date | December 19, 2012 |
| Genres |
Vocals: Keito Azuma (01,25), Noel Kinjo (26)
Lyrics: RyoRca
Guitar: sho (Vivid Coin)
| 1 | 赤い闇には幾千の (オープニング ムービー) |  | |
| 2 | Gathers Under Night... (キャラクターセレクト) | | |
| 3 | Touch & Go (vsデモ) | | |
| 4 | Scraper Sky High (ハイド) | | |
| 5 | Night Walker (リンネ) | | |
| 6 | Maximize Power! (ワレン) | | |
| 7 | Bad Surface (カーマイン) | | |
| 8 | Purity & Strictly (オリエ) | | |
| 9 | Rushing Heart (ゴルドー) | | |
| 10 | Unseen Entities (メルカヴァ) | | |
| 11 | Snow Sisters (バティスタ) | | |
| 12 | Monochrome Memory (セト) | | |
| 13 | 歩く姿は百合の花♪ (ユズリハ) | | |
| 14 | Overwhelm Despair (ヒルダ) | | |
| 15 | Blood Drain -Again- (エルトナム) | | |
| 16 | Agitation Signs (はじまり１) | | |
| 17 | Silent Moonlight (はじまり２) | | |
| 18 | Traveller's Journal (エンカウント) | | |
| 19 | Who are you? (乱入) | | |
| 20 | Paradox Altar (祭壇前) | | |
| 21 | Break Omen (一息) | | |
| 22 | Wayside Stone (勝利デモ) | | |
| 23 | Good Mooning End (おわり１) | | |
| 24 | Evil Eyes (おわり２) | | |
| 25 | heart beat breaker. (Ending) | | |
| 26 | 赫、わたしが画く孤のセカイ。 (Bad Ending) | | |
| 27 | Last Sentence (コンティニュー) | | |
| 28 | Good sleeping this night... (ゲームオーバー) | |
