The original 'Ostranauts' soundtrack, composed by Josh Culler (a.k.a. Invisible Acropolis). This DLC will receive updates as new tracks are added to the game, and currently includes:
All 26 Tracks from Ostranauts
The original tracks composed for the game, provided in MP3 and FLAC formats.
The Sky Kings
The Metal Barge
Panoramic
Echoes of He3
Fool's Gold
Dustball Sunrise
Black Glass
Trinity
The Dragon Son
Home
Broken Stream
Among Giants
The Shredder
Passing the Belltower
Imperfect Memory
Somewhere in the System
Siren's Call
Revelations
Power On Sequence
Signal Confirmed
Ladder Logic
Deadline
Bulkhead
Scope Check
Into the Black
Bootstrap
9 Bonus Tracks
Josh also composed some new tracks a couple years hence, and reworked them into these bonus tracks (MP3).
Cascade Overflow
Equation Simplex
Galaxiespur
Involution Protocol
Oort Cloud Harvest
Vestigial Assemblage
Wave V Form
Yard of the Derelicts
Yùxiān
Josh's earlier work includes the atmosphere-setting soundtracks composed for NEO Scavenger (2014) and Underrail (2015).