Available for purchase as DLC for owners of the game on Steam.
Album was composed by Tatsuya Yano and was released on November 23, 2018. Soundtrack consists of 18 tracks tracks with duration over . Album was released by POCKET PAIR.
CD 1
| 1 | Theme for "Overdungeon" | | |
| 2 | Progress Forward | | |
| 3 | Brave your Volition | | |
| 4 | Break after the Battle | | |
| 5 | Residents' Working | | |
| 6 | Irresistible Tension | | |
| 7 | Pay for your Choice | | |
| 8 | Rest to Continue | | |
| 9 | Progress deep Forward | | |
| 10 | Confrontation | | |
| 11 | Hit to the Victory !! | | |
| 12 | Something Bad | | |
| 13 | Something Good | | |
| 14 | Something Usual | | |
| 15 | Something too Bad | | |
| 16 | Something too Good | | |
| 17 | Something too Usual | | |
| 18 | Brave your Volition ~demo version~ | | |
