It is unlocked by killing 72,000 zombies in one playthrough.
- See Z-Genocider 2: Genocide Harder for the most common ways to kill zombies.
- Since the game has 72 in-game hours of gameplay, you will have to kill 1000 zombies per in-game hour to get the achievement. (In actual fact, the player has slightly more than 72 hours.)
- Unlocking Overtime Mode will grant a time extension to finish the achievement. In other words, players who are struggling to complete this achievement should complete all of the game's case files, since the time they take to complete is far outweighed by the additional time they give.
|Achievements and Trophies|
|Apprentice Rising - Bartender - Better With a Friend - Big Spender - Chuck Greene: Cross Dresser? - Clean Record - Come On! Follow Me! - Curiously Inventive - Custom Finish - DR2 Trophy Master - Death From Afar - Don't You Die On Me! - Duct Tape FTW - Explosive Temper - Fashion Aficionado - Father of the Month - Father of the Year - Finally Full - Full Deck - Half Deck - Having a Gas - He Hasn't Covered Wars... - Head Trauma - Hero of Fortune City - Improper Behavior - Judge, Jury and Executioner - Justice Served - Life Saver - Look At All That Juice! - Masquerade - Needs More Chainsaw - Professional Rising - Rising Star - Saving the Day - Slaughter - S = Laughter - Smashy - Stick 'em Up! - TK's Favorite - Tape It or DIE! - The Skill to Survive - Tough Guy - Vigilante Justice - Win Big! - Window Shopper - Wrong Kind of Chopper - Z-Genocider 2: Genocide Harder - Zombie Destruction - Zombie Fu - Zombie Genocide Master - Zombie Slaughter|