From the old old nostalgic retro games: Ultima IV-VII, Monkey Island series, Gateway 1-2 text adventures from Legend Not so old ones: Baldur's Gate series, Planescape Torment, Elder scrolls Morrowind, Oblivion, Skyrim Newer ones: Austin Wintory's scores (Journey, Abzu, Banner Saga)

It just depends on the setting and mood I am trying to immerse myself in. Usually I like, the Castlevania soundtracks, especially when done in orchestral format, Elder Scrolls Morrowind, Oblivion, and Skyrim, for majestic landscapes, Prince of Persia the Warrior Within for danger and battles, and of course my favorite two tunes that I can sit and listen to for hours... Outside the Castle (Level 6), from Wizards &Warriors and The Tavern/ Game Over Theme from Ironsword Wizards & Warriors II

I particularly like this version of Outside the Castle as it adds a sense of wonder and mystery to the music...

https://www.youtube.com/watch?v=-vCNG_f-i1g

OH MY , check out Funcom's new game music for Conan Exiles

https://youtu.be/9tln4f1Zyd8

Oslo, Norway – April 25th, 2018 – “From scorching deserts to frozen peaks, humid swamp and dry heat, the world of Conan Exiles is a large and hostile world where only the strongest will survive,” begins the narrator in this brand new video showing the journey players will take as they strive to survive Funcom’s open world survival game when it launches on May 8th.

I was so impressed with Witcher 3 OST. I also love the World of Warcraft soundtrack. Some of those zone themes evoke so many nice memories for me. Of course, it's a huge game with a lot of music so some tracks are better than others.