Everyone starts slowly scaling the towers. They were integrated with the walls, as the outer side of the tower was a part of the wall that was simply extended upwards by 1 meter. Tank and Greenie were last to go, as their big size made it hard for them to climb together with the others.
A couple of seconds later everyone was on top of the tower, crouching of course so they wouldn't be discovered by anyone from a distance.
The many houses of the city were a couple of meters away from the wall and they needed to first get down from the towers before attempting to climb on one to continue towards the center of the city. They first checked the area around the tower to make sure that nobody was around to see them.
After making sure the coast was clear they make their way down. The hard soil of the dungeon crunches a bit as they step on it. It seemed like the outer area of the city was luckily not inhabited by a lot of goblins, a great benefit to them as it made sneaking in much easier.