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