This is the No Mercy map from PD:TH ported to PD2. Also included in the download is a mod with PD:TH Enemies that you need for the map to not crash.
Merge the PAYDAY 2 folder with your PAYDAY 2 folder to install.
I couldn't port any sounds so when you reach the patient part you have to find a piece of paper that will help you figure out which patient is the correct one.
You will most likely experience crashes or bugs
Thanks to I am not a Spy... for fixing the models of the PDTH enemies.