Walk around the village, while hiding in the bushes. You can try to eliminate several guards silently.
Remember about your poison cloud arrows, which are perfect for eliminating small groups of enemies.
If you can make it through the village without being seen, you can attempt blowing up several red barrels, towards the end. Still, if you want to remain unspotted remain in shadows and wait for the most opportune moment for a takedown. Take your time, Thanks to patience, you will avoid the necessity to load the game over again.
At the end of the village, from the building guarded by mercenaries, you can make it over to the other side of the wall.
In the ruins, there is another camp. It is a good idea to use it and allot your experience points or upgrade your gear.
Around, there is a bobcat lurking, so you need to keep your shotgun ready and be prepared to fight the animal back.
Climb over the wall, using rope and hook.
Try to push into the void the opponent that is bending over. This will help you get the Renegade achievement.
After you overhear a conversation, you will be able to kill two opponents with bow. The first one is standing right in front of you and the other one is to the right, a bit above.
Use rope and hook to swing over to the projecting wall fragment shown in the screenshot. From there, climb up.