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