Rebuild 3: Gangs of Deadsville

Ive read some guides and forum threads and people still are not sure about the exact conditions to trigger this achievement so I will share with you guys what I've found and hopefully some of these ideas will help you grab this.

Everyone agrees you need to find the Pig Farmers faction and meet up with them until you get a quest where you need to give them one of your survivors.

From here, some people say trading with the Pig Farmers and buying a bunch of their food works.

Other says you need to keep meeting with them until you get lucky enough to trigger a BBQ event where they will invite you over for dinner.

Still other people have said they have gotten this achievement by starving their survivors and eating them, one person reported doing this over to 50 of his own survivors without unlocking it so its all pretty unsure.

Basically, you need to eat a bunch of people and the Pig Farmer's food count for that.

Cheers!

Update: I finally got this after accepting the Pig Farmer's BBQ 6 times while having almost 0 food and having the cannibal policy (eating my dead) I ate my dead around 10 times too.

The earliest in the story missions to get this achievo is in the 6th City called Nelson.

Early on, The Church of the Chosen One will infect a few of your survivors with the Cultist Perk.

Make these survivors preach their doctrine in one of your churches, if you stack them with leaders, the spread of the cult will go faster.

After several dozens of turns, 50% of your survivors will convert, get cultists-leaders to churches to preach to speed this up.

Cheers.

In Story mode, in the 6th city, Nelson, once you get brainwashed by the cult of the chosen ones, get 50% of your survivors following the cult to unlock the option to Preach to other factions.

One you can preach to other factions, Preach to the Dahlias several times (about 8 or 10 times) until they convert to your religion.

Converting the Dahlias will destroy their faction, be careful.

In story mode, in the 6th city, Nelson, you will eventually get an Event where one of your survivors gets kidnapped, you require a City Hall for this.

Talk to the Luddies about the van and they will direct you to the Pig Farmers.

From here you can either start a rescue mission in the Pig Farmers territory or possibly have to talk to the Church of the Chosen One.

One these events are complete, you will get the achievement.