Here is the full list of all 19 Zombies Ate My Neighbors and Ghoul Patrol achievements.
Access all bonus levels in Zombies.
Reach 250000 score.
Find all the weapon types in Zombies.
Sucessfully enter a password.
Find all the weapon types in Ghoul.
Let all neighbors die in a level.
Access a bonus level in Zombies.
Reach 50000 score.
Reach 10000 score.
Finish a level.
Save the max neighbors in one level.
Beat level 48 in Zombies.
Beat level 18 in Ghoul.
Defeat Boss: Demon Lord.
Defeat Boss: Ghost Pirate.
Defeat Boss: Robot.
Defeat Boss: Royal Revenant.
Defeat Boss: Samurai Ghost.
Save all the neighbors in Zombies.