easy explanation for the mod's large size:

Game startup (Menu):
Master Plan
Mayhem Dressed In A Suit (Drum n' Bass Remix)

Wave start (Assault):
Ode to Greed
Home Invasion 2016
The Gauntlet
Death Wish
Backstab
Steel Wrapped Gift
Evil Eye
DonAcDum
Armed To The Teeth
Searchlights
Shadows and Trickery
Dead Man's Hand
Something Wicked This Way Comes
Code Silver 2018 (Assault 1)
Code Silver 2018 (Assault 2)
Driveshaft
Use Of Force
Infinite Ammo
Operation Black Light
The Take 2016
Code Silver 2018
Utter Chaos
Blastaway
Razormind (Beta)
Razormind
Where's the Van?!
8bits are Scary
Drop Zone
Tick Tock
Left In The Cold
Sucker Punch
I Will Give You My All 2017
Screech
Ho Ho Ho
Pimped Out Getaway
Locke And Load
Full Force Forward
Kicking Ass And Taking Names
Ode To Greed
And Now We Run
Gun Metal Grey 2015
Breach 2015
Fuse Box
Pounce
Calling All Units
Clowns Are Scary
Black Yellow Moebius
Death Row
Shoutout
Hot Pursuit
Break The Rules (Instrumental)
Break The Rules (Vocals)
Wanted Dead Or Alive
Storm Fuel Overload
Wanted Dead Or Alive
Time Window
Deadeye (electronic assault, no mexican assault)

Bomb (Anticipation):
Driveshaft
Clowns Are Scary
Sweat
Dead Man's Hand

Class selection (Planning phase)
Pulse

Round win (Heist Successful):
Clean Getaway OST version

Round lose (Heist Failed):
Hard Time

Death (Stealth, Control):
Jokes on You
And Now We Wait
Freeze
Hard Time