Here is the full list of all 46 Zombie City Defense 2 achievements.
Complete all tasks on hardcore in mission 03
Kill 1000 zombies
Complete all tasks on hardcore in mission 02
Research your first tech
Spend on battlefield 30 days total
Complete all tasks on hardcore in mission 01
Scavenge 10 buildings
Save at least 5 people
Save at least 50 people
Win your first mission
Enter your first battle
Kill 5000 zombies
Kill 50000 zombies
Kill 100000 zombies
Spend on battlefield 180 days total
Spend a year on battlefield
Scavenge 500 buildings
Scavenge 2000 buildings
Destroy 100 mil$ worth of buildings
Destroy 1 bil$ worth of buildings
Destroy 50 bil$ worth of buildings
Save at least 1000 people
Save at least 10000 people
Take medic to mission
Take commando to mission
Take commisair to mission
Take guerilla officer to mission
Take minelayer to mission
Take MLRS to mission
Take napalm to mission
Take nuke to mission
Take pyromaniacs to mission
Finsih last mission in campaign
Complete all tasks on hardcore in mission 04
Complete all tasks on hardcore in mission 05
Complete all tasks on hardcore in mission 06
Complete all tasks on hardcore in mission 07
Complete all tasks on hardcore in mission 08
Complete all tasks on hardcore in mission 09
Complete all tasks on hardcore in mission 10
Complete all tasks on hardcore in mission 11
Complete all tasks on hardcore in mission 12
Complete all tasks on hardcore in mission 13
Complete all tasks on hardcore in mission 14
Complete all tasks on hardcore in mission 15
Complete all tasks on hardcore in mission 16