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