Make it through the tower to the winch room without being spotted
Mission 6, Tiergaten Flak Tower
At the start of this mission you make your way through a building and a courtyard, and then start to approach the Tiergatem Flak Tower, once you go up the stairs and obtain your next objective this is where the achievement starts from.
If you cannot sneak up and preform a stelth kill try to use the silenced Welrod pistol to take out any enemies you come across.
Note: In the first loading area room I came across 4 guards on this playthrough, on previous playthroughs I only had 3. so be on the look out for 3 or 4 guards. Once through the loading area go up the stairs and along the corridor, and note that a guard will approach from the right hand side, kill him, and then go left, take cover behind the crate and either stealth kill or shoot the enemy that comes from the room on the left hand side, continue on, and go up the staircase until you see an open door with a guard in the corridor, kill the guard with the Welrod from within the staircase and then exit the staircase and turn left, move quietly past the radio room full of guards and make your way up the stairs, this is where the second checkpoint is, exit the door to the right, and then make your way up the nearest stairs, wait at the top for the guard to approach and either kill him or wait for him to turn around and go back the way he came, then make your way to the stairs, becarefull here as sometimes the guard may be close, if he's not then go down the stairs and either stealth kill or shoot him with the welrod, make your way up the stairs and wait for a moment to take out the approaching guard, be carefull here as sometimes a second guard will approach, if he does take him out, once these guards are taken care of make your way down the stairs, stealth kill or shoot the guard and enter the winchroom, go down the stairs towards the marker, if you've followed this guide and video then the acheivement / trophy will unlock
Reload if you're seen.
The tower flak room has two checkpoints, one at the begining as you enter the tower and then again as you reach the top stairs.
http://game-play.tv/video/D8XG9721DSY7/Sniper-Elite-Killroy-...