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