Mafia II: Definitive Edition
67 Achievements
40-50h
GOG
The Professional
Obtain the ration stamps without raising the alarm
14.2%
How to unlock the The Professional achievement in Mafia II: Definitive Edition - Definitive Guide
LittleBlueTroll
TrueAchievements
TrueAchievements
The guides for the original Mafia 2 are still relevant.
This video guide (note mine) shows the method for the achievement.
Key points are:
Stealth takedown the 2 security guards (hold B when behind them) One patrols the building and one sits behind the desk on the first floor.
Getting the key for the safe from the directors office.
Disabling the safe alarm from a room in the basement.
Then opening the safe and stealing the stamps.
If you don't disable the safe alarm, you can open the safe but the alarm will sound and void the achievement. There is a checkpoint just as you initially enter through the window, so you can restart from there.
This video guide (note mine) shows the method for the achievement.
Key points are:
Stealth takedown the 2 security guards (hold B when behind them) One patrols the building and one sits behind the desk on the first floor.
Getting the key for the safe from the directors office.
Disabling the safe alarm from a room in the basement.
Then opening the safe and stealing the stamps.
If you don't disable the safe alarm, you can open the safe but the alarm will sound and void the achievement. There is a checkpoint just as you initially enter through the window, so you can restart from there.
IIDRAGONSSSII
TrueTrophies
TrueTrophies
SOHEIL133
TrueTrophies
TrueTrophies
badassshattuck
It is recommended to do this in chapter 3 "Enemy of the state".
The chapter 3 "Enemy of the State" confronts you with your first real mission as a mobster to infiltrate an administrative building and steal gasoline rationing coupons. The whole purpose of the maneuver to avoid setting off the alarm will be to get rid of the guards (to avoid any trouble) and go to the basements in order to silence the famous alarm.
When you come out in a room where there are several guards, follow the one leaving towards the stairs to the left. Crouch down to put him out of harm's way with
Retrace your steps to do the same with the one seated at the desk. Repeat with the two guards upstairs. Take the keys in the director's office then go down the stairs to the basement to deactivate the alarm mechanism.
To guide you step by step, follow the video below. The video begins in the director's office but shows you the full progress to be made in the building. The trophy will drop when you exit the building with the coupons in your possession. The following video shows you a possible route for this trophy (Credit to San Andreas Gaming): LINK
The chapter 3 "Enemy of the State" confronts you with your first real mission as a mobster to infiltrate an administrative building and steal gasoline rationing coupons. The whole purpose of the maneuver to avoid setting off the alarm will be to get rid of the guards (to avoid any trouble) and go to the basements in order to silence the famous alarm.
When you come out in a room where there are several guards, follow the one leaving towards the stairs to the left. Crouch down to put him out of harm's way with
Retrace your steps to do the same with the one seated at the desk. Repeat with the two guards upstairs. Take the keys in the director's office then go down the stairs to the basement to deactivate the alarm mechanism.To guide you step by step, follow the video below. The video begins in the director's office but shows you the full progress to be made in the building. The trophy will drop when you exit the building with the coupons in your possession. The following video shows you a possible route for this trophy (Credit to San Andreas Gaming): LINK
SideDish120, TOBY, DA, THUG, Snoop, QC
You get this mission once you meet Joe at the restaurant after you meet Derek. To not raise the alarm when you are going to get the ration stamps, you must go into the basement of the building and shut off the power to the alarm. You can stealth kill all three of the security guards fairly easily. Press 
while behind a guard to stealth kill them. Start with the one the second floor talking about his new TV. He is on the West side of the building. Then there is a guard that patrols the East side near the Directors office. Kill him on the stairs, then sneak up behind the guard behind the security desk in the lobby.
while behind a guard to stealth kill them. Start with the one the second floor talking about his new TV. He is on the West side of the building. Then there is a guard that patrols the East side near the Directors office. Kill him on the stairs, then sneak up behind the guard behind the security desk in the lobby.