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