A list of GOG games without soundtracks or with partial soundtracks. Original thread preamble here.

A game is counted as having a soundtrack if it lists "soundtrack", "in-game soundtrack", or "X soundtracks" on its gamecard. Where you see "dir", the soundtrack is in a useable format as part of the game installation.

ost = soundtrack
ost+ = enhanced soundtrack
sel = selected tracks
comp = compilation soundtrack
dir = soundtrack installed in game directory
$ = commercial release
¢ = commercial release (PWYW)

Thanks to all contributors, with special thanks to HypersomniacLive for super diligence!

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No Soundtrack [#-G]
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1954: Alcatraz
Aarklash: Legacy - ost $
Advent Rising - <span class="bold">$</span>, [url=http://www.gog.com/forum/general/missing_soundtracks_and_where_to_get_them/post250]dir (OGG)
Alan Wake - ost $
Alan Wake's American Nightmare
American McGee's Grimm
Amnesia: A Machine For Pigs - ost $
Amnesia: The Dark Descent - <span class="bold">$</span> [[url=http://www.thesoundoffiction.com/]info]
Anachronox - dir (MP3)
Apache Longbow
Arcanum: Of Steamworks and Magick Obscura - ost (, [url=http://www.terra-arcanum.com/downloads/arcanum/Arcanum_OST_Lossless.exe]Loseless)
Arma Gold Edition
Arma 2: Combined Operations
Atlantis: The Lost Tales - ost $
Atlantis 2: Beyond Atlantis - sel
B-17 Flying Fortress: The Mighty 8th
Back to the Future - dir (OGG) [info]
Balls of Steel
Banished
Battle Chess Special Edition
Beatbuddy: Tale of the Guardians - ost $
Beneath a Steel Sky - ost+
Betrayal at Krondor Pack - [url=http://queststudios.com/Joomla/index.php?option=com_content&view=article&id=68:betrayal-at-krondor-digital&catid=40:betrayal-at-krondor&Itemid=79]ost[/url]
Bioforge - sel
Blackwell Epiphany
Blade of Darkness
Blake Stone: Aliens of Gold - [url=http://www.vgmpf.com/Wiki/index.php?title=Blake_Stone:_Aliens_of_Gold_%2528DOS%2529#Music]ost[/url]
Blake Stone: Planet Strike - [url=http://www.vgmpf.com/Wiki/index.php?title=Blake_Stone:_Planet_Strike_%2528DOS%2529#Music]ost[/url]
Book of Unwritten Tales - ost in Deluxe Edition $
Book Of Unwritten Tales: The Critter Chronicles - ost in Deluxe Edition $
Broken Age - ost $
Broken Sword 2 - sel
Broken Sword 3 - sel
Brutal Legend - <span class="bold">$</span> [[url=http://brutallegend.wikia.com/wiki/Soundtrack]info]
Caesar 3 - dir (MP3)
Call to Power 2
Cannon Fodder
Capitalism Plus
Capitalism 2
Capsized - <span class="bold">$</span> ([url=http://itunes.apple.com/us/album/movements/id299784697]alt)
Carmageddon 2: Carpocalypse Now - dir (OGG)
Castles + Castles 2
Celtic Kings: Rage of War - dir (OGG)
Clive Barker's Undying - sel
Combat Chess
Combat Mission: Beyond Overlord
Commandos Ammo Pack - dir
Conflict: Desert Storm
Conquest of the New World
Constructor
Costume Quest - [url=http://doublefine.bandcamp.com/album/costume-quest-original-soundtrack]ost[/url] $, dir (MP3) [info]
Creatures Exodus
Creatures Village
Creatures: The Albian Years
Crusader: No Regret - ost
Crusader: No Remorse - ost
Cultures: Northland + 8th Wonder of the World
Daikatana
Dangerous Dave Pack
Dark Fall 3: Lost Souls - ost $
Dark Reign + Expansion
Dark Reign 2
Deadlock: Planetary Conquest - sel
Deadlock 2: Shrine Wars
Deadly Premonition - ost
Deathtrap Dungeon
Democracy 3
Deponia 3: Goodbye Deponia - ost $
Desperados 2: Cooper's Revenge - dir (OGG)
Die by the Sword + Expansion
Divinity: Dragon Commander - ost in Imperial Edition $
Don't Starve - ost $
Doomdark's Revenge
Dracula Trilogy - dir (WAV/OGG) [info]
Dragon Lore: The Legend Begins
Dragonsphere
Dream Pinball 3D
Driver: Parallel Lines
DROD 1 + 2 + 3
Dungeon Keeper Gold - ost
Dungeon Keeper 2 - , [url=http://gamemusic.wordpress.com/2009/11/19/dungeon-keeper-2/]ost
Dungeons & Dragons: Dragonshard
Earth 2160 - ost $
Empire Earth: Gold Edition
Empire Earth 2 Gold Edition
Empire Earth 3
Enclave - dir (OGG) [info]
Eschalon: Book I
Eschalon: Book II
Eschalon: Book III
Ethan: Meteor Hunter - ost in Deluxe Edition $
Evolva - dir (WAV)
Expeditions: Conquistador - ost $
Expendable
F/A-18E Super Hornet
Fantasy Wars - dir (OGG)
Far Cry
Feeble Files, The
FEZ - ost $
FlatOut 2
Forgotten Realms: Demon Stone - sel
FRACT OSC - ost $
Freedom Force vs. the 3rd Reich
Freespace + Expansion - ost
Full Spectrum Warrior
Full Spectrum Warrior: Ten Hammers
Gabriel Knight: Sins of the Fathers - comp
Gabriel Knight 2: The Beast Within - comp
Gabriel Knight 3: Blood of the Sacred, Blood of the Damned - comp
Giana Sisters: Rise of the Owlverlord
Gomo
Gothic 3 - sel
Gothic 3: Forsaken Gods
Great Battles Collector's Edition
Ground Control + Expansion
Ground Control 2: Operation Exodus SE
Guacamelee! Gold Edition - ost $
Guild Gold Edition
Guild 2

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No Soundtrack [M-P]
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M.A.X. + M.A.X. 2 - dir (MSC) [M.A.X.]
Magic Carpet Plus
Magic Carpet 2: The Netherworlds
Magrunner: Dark Pulse
Manhole: Masterpiece Edition - dir [info]
Medal of Honor: Allied Assault War Chest - dir
MegaRace 3
Memoria - ost $
Montague's Mount
Moto Racer - ost
Moto Racer 2 - sel
Moto Racer 3
Myst: Masterpiece Edition - <span class="bold">$</span> ([url=http://www.amazon.com/Myst-The-Soundtrack-Robyn-Miller/dp/B002CL9AQU]alt), dir (WAV) [info]
Nancy Drew: Curse of Blackmoor Manor - comp $
Nox - sel
Octodad: Dadliest Catch - ost $
Oddworld: Abe's Exoddus
Omerta: City of Gangsters - dir (HPK) [info]
Omikron: The Nomad Soul - sel
Outlast - ost $
Pandemonium!
Pandemonium 2
Panzer Elite Special Edition
Panzer General 2 - comp $
Papers, Please - dir
Patrician 1+2 - dir (MP3) [Patrician 2]
Penumbra Collection, The - ost $
Perimeter - dir (OGG)
Phantasmagoria - sel
Phantasmagoria 2 - sel
Pharaoh + Cleopatra - dir (MP3)
Pid - <span class="bold">$</span> ([url=http://www.reverbnation.com/store/view_item_album/artist_2725266?item_id=1654625]alt)
Pinball Gold Pack
PixelJunk Monsters HD
PixelJunk Shooter - ost $
Police Quest 1+2+3+4 - ost [url=http://queststudios.com/Joomla/index.php?option=com_content&view=article&id=169:police-quest-digital&catid=79:police-quest&Itemid=157]1[/url], [url=http://queststudios.com/Joomla/index.php?option=com_content&view=article&id=173:police-quest-2-digital&catid=80:police-quest-2&Itemid=157]2[/url], [url=http://queststudios.com/Joomla/index.php?option=com_content&view=article&id=177:police-quest-3-digital&catid=81:police-quest-3&Itemid=157]3[/url]
Police Quest: SWAT 1+2
Populous
Populous 2: Trials of the Olympian Gods
Populous: The Beginning - ost
Port Royale
POSTAL: Classic and Uncut - ([url=http://runningwithscissors.com/main/index.php?PHPSESSID=941d829d150944524b2c690b52aa82db&amp;topic=1052.0]info)
Privateer 2: The Darkening - [url=http://www.wcnews.com/wcpedia/Category:Privateer_2:_The_Darkening#Music]sel[/url]
Pro Pinball Big Race USA
Pro Pinball Fantastic Journey
Pro Pinball Timeshock
Project Eden
Psychonauts - ost $

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No Soundtrack [Q-S]
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Quest for Glory 1-5 - ost , [url=http://queststudios.com/Joomla/index.php?option=com_content&amp;view=article&amp;id=188:quest-for-glory-3-digital&amp;catid=60:quest-for-glory-3&amp;Itemid=94]3, 4 (discs 5)
Race Driver: GRID
Raiden Legacy - sel
Real Myst - dir (WAV) [info]
Red Faction
Red Faction 2
Redshirt - ost $
Restaurant Empire
Return to Krondor
Return to Mysterious Island - dir (OGG) [info]
Return to Zork
Rex Nebular and the Cosmic Gender Bender
Risen 2: The Dark Waters
Risk of Rain - ost $, dir (OGG)
Riven: The Sequel to Myst - [url=http://www.amazon.com/Riven-The-Soundtrack/dp/B002CEQFXS]ost[/url] $, dir [info]
Robinson's Requiem Collection
Rogue Legacy - ost $
Runaway: A Road Adventure
Runaway 3: A Twist of Fate - ost $
Sam & Max: The Devil’s Playhouse - dir (OGG) [info]
Sang-Froid: Tales of Werewolves - dir (WAV)
Secret Agent
Sensible Soccer 2006
Sensible World of Soccer 96/97
Septerra Core: Legacy of the Creator - sel
Shadowgrounds - <span class="bold">$</span>, [url=http://shadowgroundsgame.com/en/soundmusic.html]sel
Shadowgrounds Survivor
Shadowrun Returns - sel
Shattered Haven - ost $
Shattered Steel
Shelter
Sherlock Holmes: Secret of the Silver Earring
Sid Meier's Alpha Centauri - dir (WAV)
Sid Meier's Covert Action
Signal Ops
Silent Service 1+2
SimCity 2000 Special Edition - ost
Simon the Sorcerer - ost+
Simon the Sorcerer 2
Simon the Sorcerer 3D - dir
SiN Gold - dir (WAV) [info]
Space Empires IV: Deluxe
Space Quest 1+2+3 - soundtrack [url=http://queststudios.com/Joomla/index.php?option=com_content&view=article&id=213:space-quest-1-digital&catid=87:space-quest-1&Itemid=162]1[/url], [url=http://queststudios.com/Joomla/index.php?option=com_content&view=article&id=217:space-quest-3-digital&catid=88:space-quest-3&Itemid=162]3[/url]
Space Quest 4+5+6 - soundtrack [url=http://queststudios.com/Joomla/index.php?option=com_content&view=article&id=223:space-quest-4-digital&catid=89:space-quest-4&Itemid=162]4[/url], [url=http://queststudios.com/Joomla/index.php?option=com_content&view=article&id=227:space-quest-5-digital&catid=90:space-quest-5&Itemid=162]5[/url], [url=http://queststudios.com/Joomla/index.php?option=com_content&view=article&id=231:space-quest-6-digital&catid=91:space-quest-6&Itemid=162]6[/url]
Speed Busters: American Highways
Speedball 2 HD
Spellforce Platinum - sel
Spellforce 2: Demons Of The Past
Spycraft: The Great Game - dir (WAV)
Stacking - dir (MP3) [info]
Star Control 3
Star Wolves - dir (OGG) [info]
Starflight 1+2
Startopia
SteamWorld Dig - theme
Stick it to the Man
Stonekeep
Strategic Command: European Theater
Strike Commander - sel
Strike Suit Zero - <span class="bold">$</span> ([url=https://itunes.apple.com/us/album/strike-suit-zero-official/id808482444]alt)
Subwar 2050 Complete
Sudeki - ost $
Summoner
Super Hexagon - ost $
Swapper, The - ost $
SWAT 3: Tactical Game of the Year Edition
Sword of the Samurai
Sword of the Stars: The Pit & Gold Edition - ost $
Syndicate Plus
Syndicate Wars - dir (OGG)

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No Soundtrack [T-Z]
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Tales From Space: Mutant Blobs Attack - ost $
Tales of Monkey Island - dir (OGG) [info]
Teenagent
Teslagrad - <span class="bold">$</span> ([url=https://itunes.apple.com/us/album/teslagrad-official-soundtrack/id779285501]alt)
Tex Murphy 1+2
The Ball
The Banner Saga - ost $
The Night of the Rabbit - ost $
The Raven - Legacy of a Master Thief - ost in Digital Deluxe Edition $
Theme Hospital
Theme Park
Time Commando
Tom Clancy's Ghost Recon - sel
Tom Clancy's Rainbow Six - sel
Tom Clancy's Splinter Cell
Tomb Raider 1+2+3 - ost
Tomb Raider: The Angel of Darkness - ost
Tomb Raider: The Last Revelation + Chronicles - ost
Torin's Passage - ost
Total Overdose: A Gunslinger's Tale in Mexico
Tower of Guns - ost $
Trine 2: Complete Story - ost $
Two Worlds
UFO: Afterlight - dir (OGG) [info]
UFO: Aftershock - dir (OGG) [info]
Ultima Underworld 1+2 - ost , [url=http://gamemusic.wordpress.com/2007/12/10/ultima-underworld-2-labyrinth-of-worlds/]2
Ultima 1+2+3
Ultima 4+5+6 - ost 6 (, [url=http://dor-lomin.com/archive/ultima/musicarchive/u6/]MP3)
Ultima 4: Quest of the Avatar - sel
Ultima 7 The Complete Edition - ost (, [url=http://dor-lomin.com/archive/ultima/musicarchive/u7/]MP3), sel
Ultima 8 Gold Edition - , [url=http://www.ultima.rabbitslair.de/origin_audio_vol_3.htm]medley
Ultima 9: Ascension - , [url=http://ultima9.ultimacodex.com/the-ultima-9-soundtrack/]ost+
Unholy Heights - ost $
Unmechanical - ost $
Unreal Gold
Unreal 2: The Awakening SE
Unreal Tournament 2004 ECE
Unreal Tournament GOTY
Uplink: Hacker Elite - ost $
Uru: Complete Chronicles - dir (OGG)
Valdis Story: Abyssal City - ost $
Vampire The Masquerade - Redemption - dir (MP3)
Volgarr the Viking - ost $
VR Soccer '96
VVVVVV - ost $
Wargame: European Escalation
Warlords Battlecry 3 - dir (MP3)
Waxworks
WindForge
Wing Commander 1+2 - ost [url=http://www.wcnews.com/wcpedia/Category:Wing_Commander#Music]1[/url], [url=http://www.wcnews.com/wcpedia/Category:Wing_Commander_II:_Vengeance_of_the_Kilrathi#Music]2[/url]
Wing Commander 3 Heart of the Tiger - [url=http://www.wcnews.com/wcpedia/Category:Wing_Commander_III:_Heart_of_the_Tiger#Music]ost[/url]
Wing Commander 4: The Price of Freedom - [url=http://www.wcnews.com/wcpedia/Category:Wing_Commander_IV:_The_Price_of_Freedom#Music]ost[/url]
Wing Commander 5: Prophecy Gold Edition - [url=http://www.wcnews.com/wcpedia/Category:Wing_Commander:_Prophecy#Music]ost[/url]
Wing Commander: Academy
Wing Commander: Armada - [url=http://www.wcnews.com/wcpedia/Category:Wing_Commander:_Armada#Music]ost[/url]
Wing Commander: Privateer - [url=http://www.wcnews.com/wcpedia/Category:Wing_Commander:_Privateer#Music]ost[/url]
Zafehouse: Diaries - theme (XWM) [info]
Zeus + Poseidon (Acropolis) - dir (MP3)
Zombie Shooter - dir (OGG)
Zork Anthology, The
Zork Nemesis: The Forbidden Lands
Zork: Grand Inquisitor

Oh it's also to download, thought just missing in general.
Well i supplied a copy to GOG, kinda waiting if they can add it.
It was actually supplied by the game itself, though may have been limited to some versions.

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Partial Soundtrack (GOG contents)
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99 Levels to Hell (2 tracks) - ost $
Amerzone - The Explorer's Legacy (main theme)
Aqua Kitty: Milk Mine Defender (2 tracks) - ost $, dir (WMA)
Arx Fatalis (5 in-game sounds)
Botanicula (3 tracks) - ost $
Braveland (2 tracks)
Broken Sword 5 - the Serpent's Curse (intro theme)
Catacombs Pack (music track)
Commandos 2+3 (Commandos 2 soundtrack)
Depths of Peril (music theme)
Descent + Descent 2 (D1 in-game soundtrack + D1 best soundtrack (MAC))
Driftmoon (6 tracks) - ost $
Duke Nukem 3D: Atomic Edition (113 Duke ringtones) - dir (MIDI) [ ([url=http://www.vgmpf.com/Wiki/index.php?title=Duke_Nukem_3D:_Atomic_Edition_%2528DOS%2529#Music]alt)
Duke Nukem: Manhattan Project (113 Duke ringtones)
Dust: An Elysian Tail (soundtrack sample) - ost $
Dyad (2 music tracks) - ost $
Escape Goat 2 (prototype soundtrack) - ost $
Ether One (2 sample tracks) - ost in Deluxe Edition $
FTL: Faster Than Light (5 tracks) - <span class="bold">$</span>, [url=http://benprunty.bandcamp.com/album/ftl-advanced-edition-soundtrack]adv ost ¢
Giana Sisters: Twisted Dreams (2 tracks) - ost $
Hind (mission themes)
Humans Must Answer (4 tracks) - ost $
Incoming + Incoming Forces (Incoming soundtrack) - dir (Incoming Forces)
Journeyman Project 1: Pegasus Prime (soundtrack sample) - ost $
Knock-Knock (soundtrack EP (4 tracks)) - ost $
Master of Orion 1+2 (MOO 2 soundtrack)
Might and Magic 6-pack: Limited Edition (M&M IV soundtrack & M&M VI soundtrack)
POD Gold (race music)
POSTAL 2 Complete (Music to Go POSTAL By & 30 SMS tones)
Race the Sun (2 tracks) - ost $
Realms of Arkania 1+2 (RoA 1 soundtrack + 9 RoA 2 tracks) - dir (OGG) [info]
Realms of Arkania 3 (5 RoA 3 tracks) - dir (OGG) [info]
Retro City Rampage (soundtrack demo (10 tracks) & 10 exclusive bonus tracks) - ost $
Reus (2 tracks) - ost $
Ring Runner: Flight of the Sages (7 tracks) - <span class="bold">$</span> ([url=http://www.gamersgate.com/DDB-RRFSOST/ring-runner-flight-of-the-sages-soundtrack-bundle]alt)
Rise of the Triad (2013) (5 tracks)
Smugglers V (Smugglers V main theme)
Snapshot (soundtrack sample)
Time Gentlemen, Please! + Ben There, Dan That! (3 ringtones & 3 development sound effects & unused music)
Tiny and Big: Grandpa's Leftovers (game track) - ost $
To The Moon (music selections from other Freebird games) - ost $, dir (OGG)
Treasure Adventure Game (4 tracks) - ost $
UFO: Aftermath (UFO tracks) - dir (WAV/MP3) [info]
Ultima Worlds of Adventure 2: Martian Dreams (medley)
Wasteland 1 – The Original Classic (Wasteland music)
Worlds of Ultima: The Savage Empire (medley)

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Further Releases
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Anodyne - remix album $
Fallout 1 & 2 - Vault Archives remastered soundtrack
Freespace - remastered tracks
Machinarium - Bonus EP, (alt w/FLAC)
Oddworld series - Oddboxx Soundtrack Sampler
Origin games - Origin Audio CD Volume , [url=http://www.ultima.rabbitslair.de/origin_audio_vol_2.htm]2, 3
Outcast - Original Game Score (with extra tracks) $
Psychonauts - score $
Realms of Arkania - soundtrack anthology
Red Faction - title remix by composer
Runaway series - selected tracks and remixes
Sierra games - The Sierra Soundtrack Collection
Strike Suit Zero - Strike Suit Zero: Remixed $
Super Hexagon - tribute $
Ultima 3+4+5 - C64/C128 (alt [url=http://www.vgmpf.com/Wiki/index.php?title=Ultima_IV:_Quest_of_the_Avatar_%2528C64%2529#Music]4, [url=http://www.vgmpf.com/Wiki/index.php?title=Ultima_V:_Warriors_of_Destiny_%2528C64%2529#Music]5[/url])

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Games Without Music
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Apache vs. Havoc
Avadon: The Black Fortress
Avadon 2: The Corruption
Avernum: The Complete Saga
Comanche vs. Hokum
Geneforge 1-5
Iron Storm
Lords of Midnight, The
Personal Nightmare
Red Baron Pack
Triple Town

Additional tracks from STALKER: Shadow of Chernobyl are available here: http://www.game-ost.com/info.php?id=828

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Games No Longer On GOG
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Chessmaster 9000
Colin McRae Rally 2005 - ost $
Cryostasis - incl. theme (MP3)
Dark Matter
Fallout - incl. ost (MP3)
Fallout 2 - incl. ost (MP3)
Fallout Tactics - incl. ost (MP3)
Guilty Gear Isuka - incl. ost (MP3)
Guilty Gear X2 - incl. ost (MP3)
Mobile Forces
ObsCure - incl. ost (MP3)
Re-Volt - incl. ost (MP3)
Republic: The Revolution - incl. ost (MP3), ost
Second Sight - ost $
Space Rangers
Space Rangers 2
TOCA Race Driver 3 - ost $
Wallace & Gromit's Grand Adventures - dir (OGG) [info]
XIII - incl. remix (MP3)

Excellent thread!

Thanks Nirth! I hope I can keep adding useful content to it. I started this because I was looking for the soundtrack to Risk of Rain, and it just snowballed from there.

I think they do... I've never heard anything to the contrary anyway, plus they seem to be the only place to get that soundtrack & have been around for years at least.

Okay, we can leave your post in place. I won't add the link to the main list, because GOG already supplies the S.T.A.L.K.E.R. soundtracks.

I added a link for the Deadly Premonition soundtrack, which seems like another unofficial-but-tolerated fan download.

It's a different soundtrack to the one GOG provides (and neither of them are complete).

GOG's soundtrack is a higher quality version of the soundtrack available for download from the STALKER website.

The game-ost.ru soundtrack does not include the tracks by Firelake but has more of the ambient tracks and the main "theme"/menu track.