Undead Space

Difficulty: Hard

Strategy
Any game mode that requires you to kill zombies adds to this count, this includes Adventure Mode, Quick Play and Mini-games.

Possible good choices:
 * Last Stand
 * Column Like You See 'Em (kills about 400 zombies each time)
 * Survival: Endless (when it is released for iPhone, of course)
 * Zombie Nimble Zombie Quick
 * Wall-nut Bowling 2
 * Whack a Zombie

Trivia


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 * Dead zombies are added to the pile as you play to see how high.IMG_1994.png
 * To check your pile, click on Leaderboards on the main page, and scroll up on the pile or tap the top of the screen until you reach the top. You don't have to be signed into the game center to see your score.
 * At 1,000, you see a balloon.
 * You need to get more than 10,000 zombies killed to get the achievement.
 * When you get about 12,000 zombies, you'll see moon from Peggle Nights, another game from PopCap.
 * When you get about 16,500 zombies, you'll see space rocks, or more exactly, asteroids.
 * At around 23,000 zombie kills, you'll see gems from Bejeweled, another PopCap game.
 * The limit is 30,000 zombie kills. After that, the zombies are sucked in a black hole - and the pile doesn't get any higher (although your kills are still recorded).
 * Letting any zombies die in I, Zombie will not increase your count.
 * The name of the achievement is a reference to the video game Dead Space (the un- prefix likely comes from the fact that you fight zombies here, and zombies are undead.).
 * Many fans keep asking: How did the zombies get up there?[[File:IMG_1164.png|thumb|210px|The moon from Peggle Nights
 * Maybe the catapult plants threw them there, or it is just done that way for graphics effect.