Appears on releases
| # | Title | Length | Track artist | Release title | Release artist | Release group type | Country/Date | Label | Catalog# |
|---|---|---|---|---|---|---|---|---|---|
| Official | |||||||||
| 2.8 | 不安の律動 | 1:38 | 佐藤直紀 | 交響詩篇エウレカセブン オリジナルサウンドトラック 1 | 佐藤直紀 | Album + Soundtrack |
| Aniplex | SVWC-7294, SVWC-7295 |
| 2.8 | Rhythm of Insecurity | 1:37 | Naoki Sato | Psalms of Planets: Eureka seveN Original Soundtrack 1 | Naoki Sato | Album + Soundtrack |
| Aniplex, Bandai Entertainment (USA) | SVWC 7294, SVWC 7295 |
| Pseudo-Release | |||||||||
| 2.8 | Fuan no Ritsudou | 1:37 | 佐藤直紀 | Psalms of Planets: Eureka seveN OST 1 (romaji transliteration) | 佐藤直紀 | Album + Soundtrack | |||
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