Subnautica OST

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This article contains unmarked spoilers. Players new to the game would want to avoid or be cautious toward this article.

Cover art featuring a Seamoth and a Reaper Leviathan.

The Subnautica soundtracks were composed by Simon Chylinski. Around January 18, 2018, the official album was gifted to all buyers of the game version on Steam. It can be found and listened to in the Steam music Library, accessible through the following steps:

Open Steam, and click on "view" in top right corner.
click on "Music Details" and Subnautica's music should be accessible.

If the soundtracks is not in your Steam library, you can follow these steps to get the soundtrack if you are playing Subnautica on Steam.

Go to your Steam library and right-click on the game. There should be a button that says "Properties". Click it.
Next, click on "Local files", browse in the local files and then click on "OST". From here, create a shortcut or copy the file to music.
Sit back, and enjoy the Subnautica's soundtracks. :)

Alternatively, you can also listen to the soundtracks, commonly found in:

(Windows 32-bit OS): "(Drive):\Program Files\Steam\steamapps\common\Subnautica\OST\"
(Windows 64-bit OS): "(Drive):\Program Files (x86)\Steam\steamapps\common\Subnautica\OST"

It is also available from several different websites;

List of Tracks

#	Time	Title	Played when
1	1:49	Salutations	Main Menu, Loading Screen
2	2:58	Into The Unknown	Safe Shallows
3	1:42	Tropical Eden	Floating Island and Safe Shallows
4	1:29	God Rays	Safe Shallows and the during Dangerous Creatures Update trailer
5	2:09	In Bloom	Kelp Forest
6	2:00	Precipice	-
7	2:28	Sun & Moon	Kelp Forest
8	2:10	Finding Life	Safe Shallows
9	2:21	Crush Depth	Jellyshroom Cave
10	1:20	What are You	Primary Containment Facility
11	2:04	Original Inhabitants	Alien Caches and Grassy Plateaus
12	1:18	A Tendency to Float	-
13	1:43	Abandon Ship	End credits or when the Cyclops is destroyed
14	1:39	Ahead Slow	Inactive Lava Zone
15	1:40	Alien Expanse	Entering the Quarantine Enforcement Platform, Sea Treader's Path, Dunes or Sparse Reef biome
16	2:16	Alien Passageways	Gravity Lift in the QEP
17	1:45	Alien Spaces	Power room in the QEP
18	2:10	Alterra Science	During the Alterra Science Update trailer
19	1:28	Amid the Kelp	Kelp Forest
20	1:37	Ancient Aliens	Alien Caches
21	1:34	Arc Lights	When in the Seamoth or Prawn Suit
22	1:43	Blood Crawlers	Blood Kelp Zone , Grand Reef , Deep Grand Reef
23	1:34	Blueprint	Aurora Prawn Bay
24	2:11	Bone Fields	Bone Fields
25	1:56	Bring a Medpack	Inactive Lava Zone , Lava Lakes, Blood Kelp Zone , and the Aurora
26	0:56	Buoyancy	Kelp Forest , Grassy Plateaus
27	2:21	Caverns	Safe Shallow Caves
28	1:08	Coral Reef	Safe Shallows
29	2:29	Crash Site	Crash Zone, Blood Kelp Zone, Jellyshroom Cave
30	1:07	Cuddlefish	During the Cuddlefish Update Trailer
31	1:30	Dark Matter Reactor	When the player is in the Aurora
32	2:04	Exosuit	During the PRAWN Update trailer
33	1:22	Fear the Reapers	Blood Kelp Zone, Inactive Lava Zone
34	1:38	First Immersion	Grassy Plateaus
35	1:40	Ghost Tree	Tree Cove
36	1:59	Ghosts	During the Bones Update Trailer
37	1:40	Habitat	When the player is in a Seabase, the Grassy Plateaus and during the Machinery Update trailer
38	1:10	Infected	When the player enters the Disease Research Facility & The Infected Update trailer
39	2:47	Islands Beneath the Sea	In Grassy Plateaus, Sea Treader's Path, Sparse Reef and Underwater Islands.
40	2:11	Lava Castle	When the player is in the Lava Castle, Alien Thermal Plant, Blood Kelp Zone or Jellyshroom Cave.
41	1:06	Leviathan	During the Voice of the Deep Trailer, fire in the Cyclops
42	1:18	Cycle of Life	When the Drive Core is repaired, when the Sea Emperor dies and when the player is cured.
43	1:21	Lost River	When the player enters the Lost River, Bulb Zone, or Grand Reef biomes
44	2:38	Maneuvers	Grassy Plateaus and during the Power Nap Update trailer
45	2:14	Mushroom Forest	When the player is in a Mushroom Forest biome
46	1:22	Observatory Zen	When the player is in an Observatory
47	1:09	Red Alert	When the Cyclops is under attack by Leviathan class predators & The Silent Running Trailer
48	1:06	Rock It!	During the Ghost Update Trailer
49	1:30	Safe in Kelp forest	When the player is in the Kelp Forests
50	1:26	Seamoth	Intro cutscene; When a fire is on board the Cyclops
51	2:04	Shadow of the Reefback	When the player is in the Grassy Plateaus
52	1:49	Shallows	When the player is in the Safe Shallows
53	1:18	Sunbeam	When the Sunbeam countdown starts, Safe Shallows
54	2:43	Unknown Flora	Upon arrival at the Underwater Islands
55	1:18	Violet Beau	Upon arrival on the Mountain Island
56	1:54	Lift Off	Launch of the Neptune Escape Rocket

Trivia

Track 32, is named "Exosuit" because the original name for the Prawn Suit was Exosuit, and the track had been made prior to the name change.
In Natural Selection 2, the track Exosuit bears resemblance, during the beginning and near the end, to the Subnautica OST track Exosuit.
- This may be due to the fact that Blueprint plays in the Prawn Bay in the Aurora, and the Prawn Suit was based off of Natural Selection 2's Exosuit.
Rock It! was originally called Void and Cuddlefish was originally called Dive Buddy.
- Ahead Slow was originally named Creepy, Finding Life was originally named Higher Levels, In Bloom was originally named Hangs, Into The Unknown was originally named Water Music Melody, and Maneuvers was named Under the Ice.
  - Under the Ice was likely a reference to the Arctic Biome, which was a biome planned to be added to Subnautica before it was cut, and then repurposed into Subnautica Below Zero.
    - In fact, if one edits the files to re-implement the Arctic biome, Under the Ice is one of few music tracks that will play, along with Into the Unknown.
In Alien Expanse, Donald Trump saying "China" can be heard faintly at around 1:04 and 1:18.
- This is also mentioned in the comment of the file "vocals by Donald J Trump".

One track called Docking was used in the Coffee and Castles trailer but is not on OST or in the game.
- Docking was first used in Natural Selection II.
- There was also three other music tracks that were previously used, but scrapped for unknown reasons. These tracks were named Subnautica 01, Subnautica 02 - Spooky, and the last track currently does not have a name, although used to appear in the Lava Zone in very early versions.

In the properties of almost every music file, in the comments there are random characters, fun sentences, possible origins of the music, and shout outs. These were probably made by Simon Chylinski.
There is no OST for the Eye Candy trailer.
The total play time of all combined music is 1 hour, 39 minutes, and 30 seconds.