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