Dead Space Cheats

Cheat Codes
These codes work with the xbox 360 controller in the PC verson of Dead Space. On the Pause menu press:

[Y], [X], [Y], [X], [X], [Y], [X], [X], [Y], [X], [X], [Y]: +5 Nodes (one time only per playthrough)
[X]x3, [Y], [X]: 1,000 credits (one time only per playthrough)
[Y], [X]x3, [Y]: 2 Nodes (one time only per playthrough)
[X]x3, [Y]x2: 2,000 credits (one time only per playthrough)
[X]x3, [Y], [X], [Y]: 5,000 credits (one time only per playthrough)
[X], [X], [Y], [Y], [Y]: Refill you Oxygen
[X], [Y], [Y], [X], [Y]: Refill your Stasis and Kinesis energy

Impossible mode
Impossible mode: Complete the game on any difficulty setting.

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.

10 power nodes: Beat the game on any difficulty level
50,000 credits: Beat the game on any difficulty level
Backstory logs: Beat the game on any difficulty level
Military suit: Beat the game on any difficulty level