I'm glad you mentioned Apotheosis. The Journey soundtrack is some of my favorite music ever (and the game is also one of my favorite games) and that is my favorite track from it.

I also love the music from the game Flower.

Others that I can think of off the top of my head are Traverse Town from Kingdom Hearts, the Jak and Daxter sountrack, Candy Constellation from Kirby and the Amazing Mirror, and lots of music from Pokemon games, of which there are too many examples to list.

And pleeennntty of others. xD

I'm not in a very descriptive mood right now; sorry about that. xD