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At the Pause menu:

Cheat Effect

triangle, square,triangle,triangle,square,triangle: Refill Stasis meter
Square, Square, Triangle, Triangle, Triangle: More Oxygen
triangle,square,square,square,triangle: adds 2 power nodes, one time only
square,square,square,triangle,square: 1000 credits, one time only
square,square,square,triangle,triangle: 2000 credits, one time only
square,square,square,triangle,square,triangle: 5000 credits, one time only
square,triangle,triangle,triangle,square,square,triangle: 10000 credits, one time only

Dead Space Unlockables
Trophies
Complete each condition to get the allotted Trophies. There are 41 Bronze Trophies, 4 Silver Trophies, 3 Gold Trophies, and 1 Platinum Trophy.

Unlockable How to Unlock
Lab Rat (Bronze) Complete Chapter 2 on any difficulty setting
All Systems Go (Bronze) Complete Chapter 3 on any difficulty setting
Cannon Fodder (Bronze) Complete Chapter 4 on any difficulty setting
True Believer (Bronze) Complete Chapter 5 on any difficulty setting
Greenhouse Effect (Bronze) Complete Chapter 6 on any difficulty setting
S.O.S. (Bronze) Complete Chapter 7 on any difficulty setting
Strange Transmissions (Bronze) Complete Chapter 8 on any difficulty setting
Wreckage (Bronze) Complete Chapter 9 on any difficulty setting
Keeper of the Faith (Bronze) Complete Chapter 10 on any difficulty setting
Betrayed (Bronze) Complete Chapter 11 on any difficulty setting
Exodus (Bronze) Complete Chapter 12 on any difficulty setting
Pack Rat (Bronze) Store 25 Items in Safe
Story Teller (Bronze) Collect 75 Logs
Z-Baller (Bronze) Complete Level 6 in Zero-G Basketball
Merchant (Bronze) Collect 8 schematics
Armstrong (Bronze) Shoot 50 objects using Kinesis
Marksman (Bronze) Dismember 20 Limbs
Surgeon (Bronze) Dismember 500 Limbs
Freeze (Bronze) Use Stasis on 50 Enemies
Crackshot (Bronze) Achieve a perfect score in the Shooting Gallery
Air Alert (Bronze) Zero-G Jump over 100 times
Brawler (Bronze) Kill at least 30 enemies with a melee attack
Ragdoll Check (Bronze) Force an enemy into a Gravity Panel 5 times
Big Spender (Bronze) Spend 200,000 credits at the store
Full Contact (Bronze) Kill 30 enemies with the Contact Beam
A Cut Above (Bronze) Kill 30 enemies with the Ripper
Tool Time (Bronze) Kill 30 enemies with the Plasma Cutter
Pusher (Bronze) Kill 30 enemies with the Force Gun
Live With The Hot Ones (Bronze) Kill 30 enemies with the Flamethrower
Autofire (Bronze) Kill 30 enemies with the Pulse Rifle
Eviscerator (Bronze) Kill 30 enemies with the Line Gun
There's Always Peng (Bronze) Find the Peng Treasure
Dead on Arrival (Bronze) Complete Chapter 1 on any difficulty setting
Survivor (Silver) Complete the game on any difficulty setting
Legend Teller (Silver) Collect 150 Logs
Full Arsenal (Silver) Own every Weapon in the game
Butcher (Silver) Dismember 1000 Limbs
Epic Tier 3 Engineer (Gold) Complete the game on the hardest difficulty setting
One Gun (Gold) Beat the game using only the Plasma Cutter
Maxed Out (Gold) Upgrade all weapons and equipment
Concodrance Officer (Platinum) Collect all Trophies
Brute Force (Bronze) Kill a Brute
Exterminator (Bronze) Kill the Leviathan
Get off my ship! (Bronze) Kill the Slug Boss
Mindless Prey (Bronze) Kill the Hive Mind
Playing Catch (Bronze) Catch a Brute or Leviathan Pod using Kinesis
Kickin it (Bronze) Escape from a Lurker's grab attack 10 times
Don't get cocky, kid (Bronze) Survive the ADS Canon with over 50% Shield strength remaining
Slugger (Bronze) Kill the Slug Boss with more than 50% Shield strength remaining

Find the Peng and a note on Impossible mode
Peng is a treasure found in the Hangar in between the two sidewalks. As you leave the Kellion for the first time, look over the railing to your LEFT. There is a small statue lying on the ground. You need KINESIS to get it, so you can't grab it until Chapter 11. IMPOSSIBLE MODE Beat the game on any difficulty, save your game, and start a new game. Choose IMPOSSIBLE MODE, then play until you save your game at a kiosk (in a new slot if you like). The important thing to note is that impossible mode will not remain unlocked if you do not save a game that is playing in impossible mode.

Unlockable How to Unlock
Military suit Beat the game on any difficulty level

wat's this for?

nice list!

this is for a game called "dead space"

Never heard of it. Shouldnt this be in another section or something?

Awesome I'm getting the game soon.

im getting it too the review got 8.8/10 and it looks kinda creppy too like the first condemned for x-box

well, it got an 9/10 by gamespot and i've beaten it n it kicks ass...