The original soundtrack from "Walden, a game" by composer Michael Sweet.

Track list (MP3 files):

1. I Went to the Woods 1:04
2. Where I Lived, What I Lived For 3:47
3. Here in the Woods 3:32
4. Tonight, My Flute Echoes 0:22
5. I Have Travelled Much in Concord 1:18
6. Summer Is Gone Now 4:57
7. The Bare Trees and Twigs 5:01
8. A Sense of Solitude 2:44
9. To Be a Philosopher 1:48
10. Winter Is Arrived 3:39
11. The Hardest Month 4:51
12. I Would That I Were Worthy 1:31
13. The Mass of Men 1:27
14. A Memorable Crisis 2:58
15. See the Spring Come In 4:16
16. I Left the Woods 1:10
17. More Day to Dawn 5:59
18. A Taste for the Beautiful 0:40
19. A Single Gentle Rain 1:17
20. The Ruts of Tradition 1:16
21. Looking at What Is to Be Seen 1:29
22. To Know What We Know 1:25
23. Necessaries of Life 0:54
24. A Certain Season of Our Life 1:42
25. And so the Seasons Went Rolling On 2:36

You can play the soundtrack using the Music feature of the Steam App. You can also find the MP3 files in your Steam folder under SteamApps/common/Walden, a game/Walden, a game - Soundtrack.