Walkthrough: This station contains only the friendly units, so you can feel safe here. Wait until the conversation has ended and collect 30 rounds of gold ammunition from the first table #1. A new gold ammo round can be found on a nearby table #2.
Notice that you can spend one round of gold ammunition to change the tune being played by a nearby jukebox #1. Proceed to the next area of the bar and make sure to collect a single round of gold ammunition from the dirty sink #2. Use the stairs to get to a lower level.
You should now spend some time exploring the station. Start off by checking the area under the stairs you've just used. There are some palettes located to your right and you'll have a chance to collect 1 round of gold ammunition #1. Turn left and search the area to the right of the door leading to the armory. You'll find a single round of gold ammunition here as well #2.
You may now enter a small armory and you'll come across three merchants here #1. Buy all the supplies you need and exit the room. Notice that there are beggars and children in the area #2 and you'll be allowed to give money to them (there are four of them here). It's not mandatory, however it may prove to be important if you want to unlock the best ending.
Check the passageway located to the left of the stairs. This corridor leads to a train station #1 which is going to be occupied by a lot of people. Turn right after you've entered a new area. Make a few steps forward, turn left and check the ground for a new round of gold ammunition #2.
This mission can be continued by choosing a passageway located to the right of the stairs leading from the bar. You'll encounter a young boy here #1. Giving him a single gold bullet is not mandatory, however doing this will get you closer to a better ending and he'll also guide you to your next destination. Ignore the lower passageway for the time being and instead head forward. Check a bunk to find 1 round of gold ammunition #2.
You may now proceed to a lower passageway which was used by the boy #1. Follow him (or head forward alone). Make sure to check the area where two people are sleeping #2 to collect a single round of gold ammunition.
Keep heading forward and eventually you should come across three toilets #1. Check the toilet found to your right and you'll be able to collect 1 round of gold ammunition. Head up and choose the bridge located close to your position to get to the other side #2. Find a stash there with some standard ammunition to your current guns.
Don't leave this area just yet. Instead locate a partially opened door #1 and take a peek inside to collect a single round of gold ammunition. Return to the bridge and explore the surrounding area to locate 1 round of gold ammunition #2.
You may continue following the boy (or exploring the upper balcony on your own). Ignore the second bridge for the time being and instead look around a little. Locate a new opened door #1 to collect a single round of gold ammunition. You can also climb on top of a structure located to the right of the bridge. Check one of the corners to find 1 round of gold ammunition #2.
Approach the bridge and get to the other side. Turn left here and notice a single round of gold ammunition #1. Press the crouch key, approach the bullet and pick it up. You may now proceed to the bar. Check one of the tables seen in the distance to collect 1 round of gold ammunition #2.
Approach a man sitting inside the bar. He's called Bourbon and after a short introduction you'll have to join him by sitting on a nearby wooden chair (press the action key) #1. Confirm that you're ready (left mouse button) and notice that Bourbon has left a payment on the table - 10 rounds of gold ammunition #2.
Exit the bar and start following Bourbon. Eventually you'll both get to an unexplored area of the map #1 (the entrance is located to the left of the toilets). Once you're inside a new room turn left and take a single round of gold ammunition from a large crate #2.
You may proceed to the next section of the room. This time focus on examining a small shelf with a candle #1 and you'll find the last round of gold ammunition. Wait for your colleague to move a nearby crate #2, unlocking the exit. Talk to him to end this mission.