Reaching The Flak Tower
The level opens in a building quite a distance from the Flak Tower. Walk into the room ahead and use your Welrod on the two enemies.
Continue forward and up the stairs. Once you reach the top, take a right and aim through the door marked 35 at the two enemies on the balcony.
Head out onto the balcony. Look at the balcony on the level below you to find another soldier. After that, look down at the lowest level. Here, you can find one more soldier scurrying about.
Go through the door on the opposite side of the balcony and head down the stairs.
Make your way through the first door you see and take a right. Behind the desk with the radio equipment, you can find a Gold Bar.
Return to the staircase and head down to the bottom level. Make a right as you exit and take cover next to the boxes in the corner. Take out the remaining enemies from here as the flood in through the door.
Follow the objective marker outside and look up at the beam above the enemies ahead. You can find the first Hidden Bottle to snipe up there.
Now, take cover by the boxes and snipe the enemies at the end of this hallway from here. They will all funnel towards you. There is a mounted machine gun at the back that enemies will use; so, keep your eye for any enemies on it.
Once everyone is dead, head up to the main courtyard. Enter into the room on the left. In the back corner, to the right of the number 68 on the wall, you can find the second Gold Bar.
Head back out into the courtyard and up the stairs just to your right. Climb up into the building and head down the stairs on your left. At the bottom, you can find another Gold Bar.
Plant some Land Mines and Trip Mines on this staircase as we are going to engage the enemies ahead from the first floor. This will protect you if the soldiers start to push you. Head back upstairs and look out of the window on your left. Start shooting the enemies from here. There are two mounted machine guns on the right; be sure to focus on them first.
Once the music has quietened, you know that everyone has been killed. Go outside and up to the bunker on the left side of the hill. Inside you can find a Gold Bar.
Look outside the bunker at the entrance to the Flak Tower. On a box, to the left of the stairs, is the second Hidden Bottle.
From here, continue down the path and look next to the barricade on the left for another Gold Bar.
Reaching The Top Of The Flak Tower
Enter the Flak Tower and crouch-walk up the set of stairs ahead. Stick to the left wall and hide behind the set of barrels on the left.
Wait for the two enemies to split apart. Once one walks towards the staircase you just emerged from, use your Welrod on him. Quickly, pick up his body and take it to that staircase, making sure it is out of sight.
Wait for the second enemy to loop back around. Once he turns his back, shoot him in the head with your Welrod and move his body to the same position as the last enemy.
Another enemy will now be walking down the stairs ahead. Hide behind the pillar on the left side of the room. As soon as the enemy reaches the bottom of the stairs, walk up and hit him with a shot from your Welrod.
Now, head inside the room on the left of this area. Kill the enemy sitting at the desk and pick-up the Gold Bar from the same desk.
Take the staircase up to the floor above and immediately lay down next to the wall. An enemy will walk by you and likely notice you. Quickly, hit him with a shot from your Welrod.
Where the path splits, take a right and use your Welrod on the enemy patrolling the hall.
Continue onwards and into the first room on your right. Inside you can find one more enemy to kill and a Gold Bar behind the box in the corner.
Make your way through the corridor and into the next room. Climb the staircase and use your Welrod on the guard at the top.
On the left, there is another guard. Try to kill him as quickly as you can with your Welrod.
Head into the room on your left and pick-up the eighth Gold Bar on the middle set of shelves on the left.
Return to the corridor and kill the three remaining enemies in this area.
Follow the corridor through and up to the entrance to the roof. We will return to this room a few times so I am going to refer to it as the ‘starting room’ from now on. Pick-up the ammo from the box and head out the door and to the left.
Vault over the obstacle and take cover by the wooden box. Wait for the soldier to look over the balcony next to you. Once he does, hit him with a shot from your Welrod. Look underneath the stairs next to you to find the ninth Gold Bar.
Return to the starting room and this time head right. Look at the top of the stairs ahead to find the final Hidden Bottle. Time your shot with the explosions so that the enemies don’t get alerted.
This next section is finicky to complete in stealth. Enemies will sometimes notice bodies and sometimes they won’t. You also do not have enough time to move the bodies. Therefore, I am going to give you a recommend path; however, be warned that it can go awry at any point.
Head up the stairs ahead (where you shot the Bottle). Hide behind the metal structure and use your Welrod on the enemy in front of the bunker.
Use your Welrod on the enemy inside the bunker and move the first body into it. On the desk, you can find the final Gold Bar.
Wait in the bunker until an enemy walks close to it and back towards the stairs. Once his back is towards you shoot him with your Welrod.
Now, wait by the bunker for a soldier to loop around behind it. Once he is behind the bunker, take him out with your Welrod.
Make your way around the right side of this area, killing the enemies that are here.
Proceed to kill the final few enemies on the rooftop.
Follow the objective marker into the winch room. The cutscene will trigger, showing Müller on the rooftop of the opposite tower. Once Müller appears in the centre of the tower, hold your breath and aim far above him to land the shot.
Head out through the door in the winch room and throw a grenade at the two enemies taking cover at the end of the corridor. Kill the third enemy who will pop out just afterwards.
Proceed back down the staircase you climbed earlier and into the first room of the Flak Tower. Kill the enemy in the yellow corridor. Beneath you, there are four enemies. Take out a couple if possible, as they will start to push you from the staircase after a few seconds.
Head to the entrance of the tower and snipe the two enemies who will appear at the staircase. Go outside and take control of the mounted machine gun on the left.
Wait for the final few enemies to appear before heading to the objective marker, in turn completing the level.