What are your favourite Game Soundtracks' (OST's) of all time? Let's discuss

[Kizmi]

There are so much amazing music in games! They are art!

But Whole Halo franchise has great music with feeling! There are so many unforgettable songs.
Another is Alan Wake. Petri Alanko just knows how to write music.
Mass effect has also very memoriable soundtracks.