Skullgirls Original Soundtrack is the digital soundtrack album containing the music of Skullgirls. Despite the Original Soundtrack receiving updates that added various DLC music tracks, it still only contains a portion of the full soundtrack, missing the three musical tracks Clear Breeze, Destiny in Her Hands and Where Money Flows Like Water.
Not included in the album despite them being available at its release was the [cutscene] versions of Moonlit Melee, The Seat of Power and The Fish Man's Dance; as well as the short track Clueless Trip.
- June 3rd 2014: Lab Zero released an update adding a further three music tracks; Unfinished Business, Royal Canopy Waltz and The Dreams We Left Behind. All owners who donated $10 or more to the Skullgirls Indiegogo campaign were able to download the updated OST right away.
- October 29th 2014: Lab Zero released a second update adding two more music tracks to the album; An Oasis In Time and Chamber Below. All owners who donated $10 or more to the Skullgirls Indiegogo campaign were able to download the updated OST right away.
- April 7th 2015: The official Skullgirls Twitter announced that an expansion disc that includes all the DLC tracks will be released "once the full expanded track list for the game is complete". This date of release is as of yet unknown; but it will mark when non-Indiegogo backers are able to purchase the DLC tracks.
- The Legend of the Skull Heart
- Pedestrians Crossing
- Pick of the Litter
- In Rapid Succession
- Moonlit Melee
- Whiling the Hours Away
- Them's Fightin' Words
- The Fish Man's Dance
- An Uncertain Fate
- The Seat of Power
- Shenanigans and Goings-Ons
- Paved With Good Intentions
- Forgotten Moments
- A Roll of the Dice
- The Lives We Left Behind
- Fugue in Three Goddesses
- Dirge of the Divine Trinity
- The Catacombs Below
- Dire Machinations
- Her True Power Revealed
- Skull Heart Arrhythmia
- A Return to Normalcy
- In a Moment's Time
- Learning One's Craft
- The Lives We Tried to Reclaim
- Hitomi No Kioku (Bonus Track)
- Unfinished Business †
- Royal Canopy Waltz †
- The Dreams We Left Behind †
- An Oasis In Time †
- Chamber Below †
†=Tracks that were added via an update. (currently only available to Indiegogo campaign backers)
- Tracks 1, 5, 7, 12, 14, 17, 19, 20, 21, 23, 24, 27, 30 and 31: composed by Vincent Diamante
- Track 2: composed by Vincent Diamante and Michiru Yamane
- Tracks 3, 4, 8, 10 and 15: composed by Brenton Kossak and Blaine McGurty
- Tracks 6, 9, 11, 13, 16, 18, 22, 26, 29, 32 and 33: composed by Michiru Yamane
- Tracks 25 and 28: composed by Michiru Yamane, sung by Geila Zilkha
Opera vocals provided by Kahori Yamane.
- Source of original track listings: 
- Source regarding contents of first update: 
- Skullgirls co-composer Blaine McGurty's soundcloud: