Once you are back in control, look on the chair opposite the desk and interact with the Guitar [Instrument 1/2] for a Morality Point . Exit the room and turn left.
Note that during this mission, there are several conversations (4-5) going on as you proceed through the area. Stopping and listening to them will often reward you with a Morality Point (4-5 in total) as well as backfilling some of the story and letting you know what is going on elsewhere in the Metro.
Follow the set path through the station here and when you reach the room with the pair of soldiers playing a game of checkers, look on the chair in the corner to the left behind them and interact with the Guitar [Instrument 2/2] here for a Morality Point . Proceed through the next door.
You will find yourself at an armorer. Approach the counter and listen to the armorer, who will hand out some items and give you a brief tutorial on each. He will give you a Gas Mask, Filters, Medkits and +160 Military Grade Rounds . When he is done talking, check out the locker just to this right and you will be allowed to pick three weapons to take with you. It is best to equip weapons effective at short, mid and long range – but I’ll leave selection up to you.
You’ll have the following selection to choose from:
Note: Whilst picking weapons at this point, you can also apply all of the available upgrades for free. Installing all upgrades into all of your equipped weapons at this time will net you a Morality Point .
When ready, exit the armoury and move to the right. Shoot the targets on the shooting range here until you are able to proceed. You can stay and practice if you like for another Morality Point. To keep going, go through the door opposite the shooting range.
Again follow the set path through the base until you meet up with your friend from earlier. Now you need to walk with him, take the lift down and continue along until you reach a meeting room. A Morality Point will be awarded as you enter. Watch the scene and afterwards go through the door that opens. Before entering the lift, look on the chair to the right in front of it for a Diary Note [Note 1/1].
Take the lift up to the next area and enter the train that arrives to complete the mission.
Note: At this point you will earn the achievement/trophy 'Rabbit'.