Half-Life,Tau-9(drums and riffs).
Half-Life 2, Triage at Dawn(one of the saddest piece of music I have ever heard),Slow Light,Our Resurrected Teleport,Particle Ghost.
Half-Life 2 e 2, Vortal Combat.
Silent Hill, esspecialy Silent Hill 2.
S.T.A.L.K.E.R. SoC and CoP, first for slow ambient music second for more actiony music, CoP end credits music is on of the greatest end credits songs I have ever heard.
Hitman:Blood Money, Vegas,Night Time In New Orleans.
Mirror's Edge, music was the reason I bought the game.
Trine.
Mass Effect, From the Wreckage,Love Theme,
Mass Effect 2,Suicide Mission,The Illusive Man
NFS 3:Hot Pursuit, Romulus 3