Originally Posted by Oynox Slider
I would say there are three missable achievements.
"Love the Boom" is almost impossible to do, if all outposts are freed. Did not find a method to do it yet.
This video below shows you how to get it pretty easily after doing all the outposts :
If they don't spawn in a group, just turn round and run down the road for 20 seconds or so and come back.