On this page of our guide to Wolfenstein: Youngblood you will find a detailed description of Brother 2 Underground side mission. This task concerns the use of a laser burnt-out transition to the underground under Political Detention Area 4. The aim is to reach the Brother 2 district, which is connected with one of the raids of the main plot of the game.
This mission is unlocked at the end of the Laser Breach Device side quest - its description is on a separate page of our guide. By going through the underground you will reach the new district of Brother 2 and you can take on the main mission - Raid Mission: Brother 2.
As a reminder, the descent to the underground is located next to the courtyard with a bus, on which the laser cannon was mounted. Thanks to completing the Laser Breach Device mission you could burn a hole from the above picture. Jump into it and reach the gateway to Brother 2 Underground.
It is very dark in the basement and as a result you have to help yourself with a flashlight. You can travel with a weak weapon in the other hand, or use Sturmgewehr weapon more often, which has a factory-installed flashlight.
It is worth trying to eliminate as many opponents from hiding as possible. If there are direct fights, use a weapon with a flashlight or try to move to locations where there are, for example, burning barrels. This will enable you to track your enemies with weapons which don't have a flashlight.
You have to get to the place where you have to destroy the padlock. This will open a passage to the platform. You can get between cars or participate in the following open battles. You can pass through the wagons, as well as find an additional loot in them.
At the very end of the tunnel you'll find a padlocked door again. Once again, use a firearm or melee weapon to destroy it.
Complete the last part of the underground crossing. You don't have to explore the whole area, fortunately. The destination is shown in the picture - it's the gate that sisters must lift in cooperation with each other.
After the door has been lifted, take a short walk to the padlocked door shown in the picture. Destroying the padlock and opening the door will allow you to move to Brother 2 district and complete the mission.
Rewards: 4500 XP, 225 silver coins, 1skill point, Brother 2 district.