Best game soundtrack!

So after listening to it for the 1000th time I have to admit I'm hooked in Hotline Miami's Soundtrack! Talking to a friend of mine the other day he said that Hotline Miami's soundtrack is what the 80s should have been... They had the samples, they had the synthesizers so they had everything they needed to make awesome music. I mean, I love a lot of bands from the 80s but that general "80s" sound is a bit lame (if you think I'm wrong please do explain with examples as I love to learn about music).*

Anyway, back to topic... From HLM to Alan Wake, from Diablo (1) to Red Dead Redemption, from Chrono Trigger to Portal 2 there is a ton of great music in games! So which soundtracks do you like the most? And why? If you could spare some links it would be great! ^_^

Cheers!

*Don't give me Rock examples as I am quite aware of those. I was talking about electronic music such as what we have in HLM'sOST.