I played the game Diablo a few years ago, and since then I've been amazed by the moody soundtrack. I've tried learning it by ear a few times, but I've given up every time. Until now that is.
To play this right, you should mic up your accoustic guitar, and run it through a delay-effect with 3 or 4 repeats. And then just play it clean. You can "fake" the essential parts of the echo though. It just requires a little skill. And it's not really nececarry at the fingerpicking sections.
The tune starts out with the following chords:
Strike each chord once or twice depending on the settings on your delay-effect. If you don't have one hit them 8 times each with decreasing strength.
Then on to the first fingerpicking section...