When we finally got the No Mercy port we all wanted, I kinda got an idea for a heist track based on the OST of L4D. More specifically, music based on the No Mercy campaign of that game.

This was harder than I thought it be because the Left 4  Dead OST doesn't have many tracks that can be translated well into a heist track but I wasn't going to let that stop me :D

Stealth uses the track "Save Me Some Sugar" but heavily edited to sound like it's coming from radio (hopefully... If anyone can make a better version, feel free too)

Control and buildup portions use the safe room music from the No Mercy campaign.

Assault uses the horde music from Left 4 Dead 1.

Video of it in action (sorry, the video quality is all over the place ;-;)

Place in mod_overrides.