Here is the full list of all 42 Rebuild 3: Gangs of Deadsville achievements.
Discover the true origin of the disease
Complete the Return to New York questline
Use 50 bath salts in one game
Fully infect the Dahlias with your cultists
Get any survivor to defense level 20 (includes equipment)
Complete the final scenario city
Repair an airplane and fly away
Complete the Gangs of Deadsville questline
Complete the Pig Farmer questline
Become Gustav's friend and get his special deals
Kill 100,000 zombies cumulatively
Equip every survivor with a gun
Have 5 hospitals, 10 medkits, and 100 medicine at once
Equip a Rocket Launcher
Have 365 food at once
Equip 10 animals
Eat enough people to be considered evil cannibals
Kill 10,000 zombies cumulatively
Have 50% of survivors become cultists
Reclaim the entire city
Get any survivor to level 10 in some skill
Fix a Power Plant
Declare peace with a faction
Complete scenario city 1
Find 100 items while scavenging cumulatively
Generate a surplus of 50 food per day from farms
Kill 1000 zombies cumulatively
Light off Fireworks
Have a survivor with 10 in every skill
Have 100 survivors at once
Finish any city on Hard difficulty
Finish any city on Impossible difficulty
Finish any city by day 50
Finish any city on any difficulty
Destroy every faction on the map
Destroy any faction
Produce 100 items in the workshop cumulatively
Be allies with every faction in the city
Complete every research project
Become allies with any faction
Build a City Hall
Kill 100 zombies cumulatively