May I say "Hell yes"?
This one is filled with such Win. It's perfect for what you describe it being in your game. Once it's out, I'll look forward to being hunted by G.A.V.I.N., JUST so I hear this song. :P
As for the song itself, I thoroughly enjoyed it. There were a lot of little tidbits I could follow, all at once, which was awesome. I'm glad how you found a great balance for everything - you didn't overdo it. The 'heartbeat' is an awesome feature, all in all. And the guitar, while not the best sample, was used very well.
Your best song to date? I believe so. 10/10, 5/5, fave'd, downloaded, eargasm'd.