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