Here is the full list of all 11 Zombie Party achievements.
Have 25,000 gold in your player account!
Play Zombie Party for Twelve hours! Go Home!!!
Die 15 times!
Have 10,000 gold in your player account!
Play Zombie Party for six hours! Keep going!!!
Eat 69 Cheeseburgers!
Um... yeah.
Shoot 10,000 Bullets!
Gotta blow 'em up!
Play Zombie Party for one hour!
Hop around until something happens!