State of Decay

This achievement is one huge spoiler, so continue reading at your own risk.

First, you will want to go through Sasquatch's missions... to do so, please refer to DARKOScannley's guide here:



After you have done the Juggernaut mission, wait for about ten minutes and you'll get a new mission: Sasquatch is missing. Uh oh! Go find him, and you'll discover that he has a nuclear warhead and is planning on blowing up the town. He says that it will blow up if he dies. If he does die, by any means, you have lost the chance to pop this achievement.

Once you take him back to town, you can talk to him and tell him to either blow up the town after you get on the next helicopter, or wait. If you tell him to blow up the town, you can't back out and it automatically saves, so proceed with caution. After your next siege, you'll get on the chopper, the town will blow up, and it will immediately overwrite your save. Achievement unlocked.