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