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