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!!!
Have 10,000 gold in your player account!
Die 15 times!
Eat 69 Cheeseburgers!
Play Zombie Party for six hours! Keep going!!!
Um... yeah.
Gotta blow 'em up!
Shoot 10,000 Bullets!
Play Zombie Party for one hour!
Hop around until something happens!