'Spy Room' - Jesper Kyd:
http://www.youtube.com/watch?v=eKf1-9HdWd8
'Vegas' - Jesper Kyd:
http://www.youtube.com/watch?v=qa0kmgysf2Q
'Winter Night' - Jesper Kyd:
http://www.youtube.com/watch?v=BSzVl-9Er9w (skip to 0:38)
'Night Time in New Orleans' - Jesper Kyd:
http://www.youtube.com/watch?v=2ZaRQow9tA0
'Day Time in New Orleans' - Jesper Kyd:
http://www.youtube.com/watch?v=VG7RTVIUs-c
'Home of the Brotherhood' - Jesper Kyd:
http://www.youtube.com/watch?v=P9uhzBPadOQ
'Ezio's Family' - Jesper Kyd:
http://www.youtube.com/watch?v=O0i6YFrSs6c
'Leonardo's Inventions' - Jesper Kyd:
http://www.youtube.com/watch?v=o719S0xlP...ure=relmfu
'Sanctuary' - Jesper Kyd:
http://www.youtube.com/watch?v=65K3wF4BkD0
'Tour of Venice' - Jesper Kyd:
http://www.youtube.com/watch?v=ZJz9OGYmPvs
'Dream of Venice' - Jesper Kyd:
http://www.youtube.com/watch?v=KvZHAT7xHO4
'City of Rome' - Jesper Kyd:
http://www.youtube.com/watch?v=Fyee46OFCkc
'Jerusalem' - Jesper Kyd:
http://www.youtube.com/watch?v=s7mckkSeONo
'Assassin's HQ' - Jesper Kyd:
http://www.youtube.com/watch?v=VJrRbg8L7RQ&feature=plcp
'What Lies Hidden Must Be Found' - Jesper Kyd:
http://www.youtube.com/watch?v=dqqXyzkpiEA
Let's face it, Jesper Kyd absolutely kicks at this shit.
'Antissa' - E.S. Posthumus:
http://www.youtube.com/watch?v=f2yJzMgaUAk
'Menu Ambience' -
Mirror's Edge OST: [url]
http://www.youtube.com/watch?v=rIaMxEjDH...re=related[/url]
'Kate (Ambience)' -
Mirror's Edge OST: [url]
http://www.youtube.com/watch?v=FjQjcG6lInk[/url]
'Kate (Puzzle)' -
Mirror's Edge OST: [url]
http://www.youtube.com/watch?v=TbdBNMTR8mM[/url]
'Monastery Ambience' - Painkiller OST:
http://www.youtube.com/watch?v=WYcty7qM8NI
'Forest Ambience' -
Painkiller OST: [url]
http://www.youtube.com/watch?v=BB9XNQ1pYq8[/url]
'Zaton (Day)' -
S.T.A.L.K.E.R.: Call of Pripyat OST: [url]
http://www.youtube.com/watch?v=C2af7vXcf4A[/url]
'Times Square' -
Phone Booth OST: [url]
http://www.youtube.com/watch?v=izmoQ0POlTA[/url] (edit by me)
'Saints from the Streets' -
Boondock Saints OST: [url]
http://www.youtube.com/watch?v=q7mCAGiySgo[/url]
'Secret Karma Serenade' - Yasushi Ishii:
http://www.youtube.com/watch?v=n_7NnYoCMZA
'Die Fledermaus' - Matsuo Hayato:
http://www.youtube.com/watch?v=4x9MJXI0KbY
'Song of Demeter' - Matsuo Hayato:
http://www.youtube.com/watch?v=VpVeUTDajn0
'Anima Doloris' - Media Music Factory:
http://www.youtube.com/watch?v=qYp0W2Dy78I
Those are just the "calm" tracks off the top of my head, the kind of music you listen to while you're reading something or trying to think. If you're interested you can search more from the listed artists/albums I listed. I'd also suggest looking into the
Black Butler, Black Lagoon, Requiem for the Phantom and
Splinter Cell soundtracks - some good stuff in there.