Now you will have to complete a simple task of zipping down lines and taking simple leaps.
All around the location, still before you enter the building, you find only two opponents. Try to get the first one from behind and there is a chance of throwing him down, after you attack him. In the entire game, you only need five such actions to obtain the Renegade achievement.
It is easy to eliminate the other opponent after you get him from behind and after you zip down the line.