Story related; cannot be missed.
*** Spoiler - click to reveal ***After the group escapes from the horde into the warehouse, David will show up and get inside (whether you let him in or not). When it is revealed that the warehouse is storing stolen goods from other communities, the group concludes that Max and the others were stealing without David’s prior knowledge. Eventually, the thugs will arrive and a confrontation will take place. After choosing whether or not to beat Badger to death, you'll then get a choice on what to do with Max. Once you make that choice, the chapter ends and the achievement unlocks.