Here is the full list of all 25 Containment: The Zombie Puzzler achievements.
Kill 5,000 Zombies
Complete all 20 blocks in Town Hall Survival
Open 20 vehicles.
Complete the campaign
Complete Act 3 by defeating the boss without the forklift.
Kill 1,000 Survivors
Kill 500 Survivors
Watch America's Fighting Dinosaur at the drive-in.
Shoot 10 zombies offmap with Sniper items.
Apply the zombie cure to one patient. Congratulations. You created super zombies.
Complete Act 2
Kill 1,000 Zombies
Kill 100 Survivors
Kill 8 or more survivors with a single air strike.
Kill 500 Zombies
Complete Act 1
Kill 5 non-Zombies with a single grenade.
Kill 10 Survivors
Kill 100 Zombies
Witness the glory of aggressive fonts!
Surround 20 zombies at once.
Surround 15 zombies at once.
Kill the first zombie in the Campaign.
Kill 10,000 Zombies
Complete all 10 blocks in Graveyard Survival.