| Achievement | How to unlock
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|---|
| A Real Challenge ( 20 points ) | Acquire at least one star in each of the Challenge Rooms 1 to 56.
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| Cat burglar ( 20 points ) | Get to the boss of Area 05 within one minute and thirty seconds.
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| Clean as a whistle ( 20 points ) | Clear Area 02 without touching a slime blob.
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| Elite Commando ( 5 points ) | Clear the game on Super Hard.
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| Faster Than a Speeding Bullet ( 20 points ) | Block 100 projectiles using the claw.
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| Frank is that YOU? ( 11 points ) | Defeat a Franken without taking any damage.
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| H4><0rz ( 10 points ) | Hack through all the hacking games on Hard.
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| Hey Doc! It's GO time! ( 42 points ) | Defeat the final boss.
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| Intel Collector ( 5 points ) | Acquire all database logs.
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| Master Wrangler ( 13 points ) | Score the most ZGU's in an online Skirmish match.
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| Meet with annihilation ( 20 points ) | Kill all foot soldiers and enemy trucks on a Meet With Enemy sequence.
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| New Ooze ( 10 points ) | Destroy every Gloomex canister.
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| One Dozen Yashichis ( 20 points ) | Collect all twelve hidden Yashichis - one from each of Area 01 to 12.
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| Pacifist Pride ( 20 points ) | Clear any of Area 1 - 12 without firing your gun.
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| Private Arsenal ( 20 points ) | Obtain every weapon and weapon upgrade.
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| Staff Infection ( 10 points ) | Capture or Destroy all 10 Frozen Codebase shirt wearing zombies.
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| The Emperor's New Clothes ( 20 points ) | Obtain the Shin Guards, the Bulletproof Vest and the Helmet.
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| Undead Basket ( 10 points ) | Complete a survival mission only using your wrangler pack.
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| You're Not Brain Dead ( 4 points ) | Wrangle a Zombie.
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| Valley of Fortune ( 20 points ) | Find 20 Zombie Tarot Cards.
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| Voodoo Magic ( 14 points ) | Find 20 Voodoo Dolls.
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| Zombie Assassin! ( 13 points ) | Kill 25 Zombies using your ranged weapon in online Ranked Skirmish.
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| Zombie Horde ( 20 points ) | Suck up 50 zombies in campaign, co-op, Ranked Multiplayer.
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| Zombification ( 33 points ) | Play online with a player who carries the infection.
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| Code | Effect
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|---|
| Up, Down, Y, X, X, Y, Down, Up, LB, LB, Start | Unlocks IGN Challenge Room for Xbox 360 (also works on PC version with 360 controller input)
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| Down, Up, Down, Up, Left, LB, X, LB, X, Y, Start | Unlocks Eurogamer Challenge Room for Xbox 360 (also works on PC version with 360 controller input)
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