Dead Space – Platform: XBox 360

Cheat Codes:
On the Pause menu, enter:

Code Effect
X(3), Y, X. – +1, 000 credits
X, Y(3), X(2), Y. – +10, 000 credits
Y, X(3), Y. – +2 Nodes
X(3), Y(2). – +2, 000 credits
X(3), Y, X, Y. – +5, 000 credits
X, X, Y, Y, Y – Refill you Oxygen
X, Y, Y, X, Y – Refill your Stasis and Kinesis energy

A Cut Above:
Kill 30 enemies with the Contact Beam.

Air Alert:
Achieve a perfect score in the Shooting Gallery.

All Systems Go:
Complete Chapter 2 on any difficulty setting.

Collect 8 schematics.

Kill 30 enemies with the Flamethrower.

Complete Chapter 10 on any difficulty setting.

Big Spender:
Force an enemy into a Gravity Panel 5 times.

Beat the game using only the Plasma Cutter.

Own every Weapon in the game.

More Oxygen:
When in outerspace and low on air, simply press start the press
X, X, Y, Y, Y and you will hear a chime. After unpausing, you will
have full oxygen again.

New Game Plus:
Save after finishing the game. Then, load your CLEARED GAME save. You
will start a new game on the difficulty which you previously beat the
game with all you Items, all your upgraded equipment, including 10
extra power nodes, 50, 000 extra credits, and the schematic for the
Military suit (a LEVEL 6 SUIT that costs 99, 000 credits).

Keep Military suit for Impossible difficulty:
First, you must beat the game on New Game Plus mode, with the Military
Suit bought and equipped, and save the game right before the last boss.
After the game ends and the credits roll, skip them, and do not save
the game when it asks you to. Instead, immediately start a completely
new game on Impossible difficulty, and you will start the game wearing
the Military Suit.