Any videogame chill music you would like to share?

First thing that came to mind was Catherine.

Also Blue Reflection, which I've just started playing.

https://www.youtube.com/watch?v=LGf3bDdNm9w

Planet Coaster chill and relax

Endless Space's Soundtrack is really good.

Free on bandcamp: https://gameaudiofactory.bandcamp.com/album/endless-space-soundtrack

Some "chill" OSTs I listen to regularly: Starbound and Dust: An Elysian Tale

Cognition: An Erica Reed Thriller - Main Theme

Atlantis: The Lost Tales - Back to Atlantis

The Elder Scrolls III: Morrowind - Peaceful Waters

Soul Calibur III - Healing Winds

Way Of The Samurai - Afterglow

Divine Divinity - Song of the Wind

God of War - The Splendor of Athens

Final Fantasy X - To Zanarkand

Final Fantasy VIII - Breezy

I've got Dragon Quest on the mind since the DQ XI announcement but aside from the battle music it's usually pretty relaxing. Here's an example:
https://www.youtube.com/watch?v=xP3PDznPrw4

Talos Principle

Guilty Gear

Thanks everybody for all the feedback so far. I know some of the videogame titles but never played them so It's very nice to check they have an amazing musical score. Mostly everything is going to a SG playlist.

Here are some soundtracks that I really enjoy (In no particular order):

1. Life Is Strange
2. Life Is Strange: Before The Storm
3. Alum
4. Submerged
5. Remember Me
6. Layers of Fear

First and foremost: Everything Blizzard-related, just a few examples:
Warlords of Draenor - Light in the Darkness
World of Warcraft - A Call to Arms
Diablo - Tristram Theme
StarCraft 2 Legacy of the Void - Obilivion Awaits

Aside from that my personal highlights are:
Witcher 3 - Wild Hunt OST
Stardew Valley OST
Brothers - A Tale of Two Sons OST
FTL OST
Ori and the Blind Forest - Definitive Edition OST
Rimworld OST

"Chill music"?Hm...
Two Worlds I - Menu Theme
The Witcher I - Silver Sword
Fable I - Oakvale
Mass Effect I - Menu Theme
Mass Effect I - Ending Song

https://www.youtube.com/watch?v=UmOm5KyreRk no one can ever beat this, my first RPG game when I was a little kid, now I'm 30. O_O

I turned these game themes into ringtones because they're so damn cool... ^^

• Doom 3
• Vampire the Masquerade - Bloodlines

I love these threads. Sharing my favorites as well. I have a thing for game music.
Skies of Arcadia - Kingdom of Ixa'taka
Skies of Arcadia - Little Jack ~ World Map Theme #2
Final Fantasy Brave Exvius OST - Monument Valley
Final Fantasy VI Music - Ending Theme The last GREAT and REAL Final Fantasy.
Guilty Gear Xrd -SIGN- OST Birthday Train
Darksiders 2 - Guardian Boss Music One of the few boss themes that actually got me going and brought a tear to my eye. SO epic!
Sonic & All-Stars Racing Transformed "Samba Studios (Samba De Amigo)"
Rage Soundtrack - Intro Theme "Apophis" DAMN that game was amazing. Shame we'll never see a Rage 2.
The Walking Dead Season 2 Episode 1 All That Remains Credits For some reason this just stuck with me. SO beautiful.
Legendary Belmondo - Castlevania Curse of Darkness
Baljhet Mountains - Castlevania Curse of Darkness
Ravenloft: Stone Prophet - Song of the Elusive Ghost

I know, I know. I'm all over the place with these. I'll post more later if anyone wants.

Already mentioned by other people:
Ori and the Blind Forest
Dust: an Elysian Tale

Not mentioned:
Hyper Light Drifter (calm and ambient with a very interesting style)
FEZ (same composer as HLD, not as good imo but still very chill)
Headlander (not the chillest thing but absolutely great)
Shadow Warrior (traditional asian style, really relaxes me)
else.Heart.break() (rather unique music, mostly trip-hop, really chill overall)
Laserlife (the rythmically relaxing kind of music)

I got you covered, fam.
Chronopolis - Chrono Cross
Mystery of the Forest - Chrono Trigger
Vector to the Heavens - Kingdom Hearts 1.5 HD Remix
Chrysanthemum in Winter - Star Ocean: Till the End of Time
Noel's Theme~The Last Travel - Final Fantasy XIII-2
Field to Tomorrow - Lunar 2: Eternal Blue
Freya's Theme - Final Fantasy IX
Eruyt Village - Final Fantasy XII
Satorl Marsh: Night - Xenoblade Chronicles
Main Theme - Xenoblade Chronicles
U.M.N. Control Center - Xenosaga II
Enzo and Drive - Bayonetta
Promyvion - Final Fantasy XI: Chains of Promathia
A New Hope - Samurai Legend Musashi
Autumn Footfalls - Final Fantasy XI: Wings of the Goddess
Portabellohead - Crypt of the Necrodancer
Desert of Despair - Ys Seven
Planet Popstar - Kirby Star Allies
Treasure Trove Cove - Banjo-Kazooie

I absolutelly love the soundtrack for SteamWorld Heist, by Steam Powered Giraffe ❤️

Also, the menu theme from Two Worlds is an especially beautiful song in my opinion :)

No Man's Sky

Breath of the Wild

Legend of Dragoon OST-23 Shana's Theme
Resident Evil 2: Save Room
Shadow Hearts 1 OST - 25 - ALICE
.Hack//infection Extended OST - Field Grassland ~ Rain
Lots of good mellow background music from these ^ games.
Beyond Good and Evil Soundtrack- 'Peace'
Planescape Torment Soundtrack - Deionarra's Theme
Planescape Torment Soundtrack - Annah's Theme
That's it for off the top of my head, I also like the music from Freedom Fighters. Not very mellow, but interesting.

Resident evil 2 https://m.youtube.com/watch?v=CtC-w3RsKQk

Sega Extreme Sports

Sorry if I'm too late, wanted to share something too: Lineage 2 Dion music, Legacy of Kain - Soul Reaver and, of course, music from Blizzard games, for example, World of Warcraft: this, this and this.