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