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