Here is the full list of all 17 Zombie Grenades Practice achievements.
Kill a zombie.
Kill a fat zombie.
Slay the Cyberzombie.
Smash a zombie with a crane.
Ram zombies down with a train.
Destroy a special object.
Catch a drone.
Find a collectible item.
Find all of the collectibles.
Get 3 stars.
Get 50% of the stars.
Get 100% of the stars.
Kill a teammate.
Blow yourself up.
Fall down from the platform.
Step on a landmine.