Outer Wilds - The way this game uses music and ambient sound to foster a sense of wonder, dread, excitement, sorrow, and much more is nothing short of incredible. Probably the best game I have ever played.
Subnautica - Equally impressive use of music as Outer Wilds, many of the same feelings, but a much much different vibe and genre.
Return of the Obra Dinn - A grim game where the soundtrack with church bells and heavy string instruments really underscore the mood.
Outer Wilds covered a lot of emotions for me. Wonder, excitement, sorrow, fear, relief, anger, frustration, calm, contemplativeness, despair, hope, terror, acceptance.
It’s my favorite game ever, and the less you know about it when you play it, the better.