Story related
*SPOILERS*
1. Choose whether to go to the farm with the two strangers
2. When you eventually get to the farm, fix the swing (rope is on the porch, saw and wood are on the far left)
3. Talk to Andy and decide to fix the perimeter.
4. When stuck behind the tractor, go right, observe that the blades are stuck in the dirt
5. Go right again and raise the blades.
6.Go left and pull the brick from under the tire.
7.When the tractor stops, go left and pull the walker out of the way.
8. Go left and pull the next walker, which will attack. You will then have to keep moving behind the tractor, and stay ahead of the zombie.
9. Talk to whoever you want, then go talk to Andy and his brother and choose to look for the bandit camp.
10. Search the boxes on either side of the camp for a camera. *thanks to Shinwasha for pointing out the spawn point isnt always the same*
11. Check the sleeping bag in the tent. After the cutscene and another hard choice, the achievement will unlock.