Reddit reviews Steins Gate (Original Soundtrack)

Oh you are referring to the VN? Man you throw all of us in a loop.
The song is Cycle.
***

Steins;Gate Visual Novel Original Soundtrack:

Links:

• Digital copy is available at iTunes and/or OTOTOY.
  
• Physical CD is available at CDJapan, Amazon, Solaris Japan, Play-Asia and/or YesAsia.
  
  
  Tracklist:
  
  

1. Skyclad Observer Short Ver.
   
2. GATE OF STEINER -Main theme-
   
3. The universe
   
4. Laboratory
   
5. Suspicious eyes
   
6. Noisy times
   
7. Explanation
   
8. Quiet air
   
9. Yanagibayashi
   
10. Walking on sleeping
    
11. Cycle
    
12. Hack -beta vision-
    
13. SERN
    
14. Assailant
    
15. The Limit
    
16. Select of sorrow
    
17. Chaos mind
    
18. Crossroads
    
19. Self affirmation
    
20. Believe me
    
21. GATE OF STEINER -Piano-
    
22. Hack -alpha vision-
    
23. Human community
    
24. Network battle
    
25. hesitative consideration
    
26. Urd
    
27. Fake Verthandi
    
28. OPERATION SKULD
    
29. Solitude
    
30. Ringing -Beginning of fight-
    
31. Ringing -Village-
    
32. Ringing -Easygoingness-
    
33. Ringing -Precaution-
    
34. Ringing -Over the sky-
    
35. Ringing -Reunion-
    
36. Ringing -GATE OF STEINER-
    
37. Hack -short vision-
    
38. Masquerade ~from Noa The Third Chapter Retsuo New Genesis Volume~ Short Ver.
    
39. Farfalla of Fate Short Ver.
    
40. Another Heaven Short Ver.
    
    ***
    -Music wiki page

Not that I condone piracy, but I found this during my search for the soundtrack in the past. That page has download links for, as far as I can tell, every single piece of Steins;Gate-related music.

If you're interested in actually buying it, here are a few of the places which have it for sale:

Amazon

Play-Asia

CDJapan

This has some soundtracks from both the game and anime i think. I'm sure you can find others if you look around on google. And if that doesn't work, there is youtube.