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