Dead Space

At the Pause menu:

Press Start to pause game play, then enter one of the following codes. A sound will confirm correct code entry. Press Start to resume the game with the code activated. Note: Some codes may only be enabled once per game. Also, codes that have multiple tiers (for example, credits) only take effect when activated in order (lowest to highest).

Refill oxygen
Press Square(2), Triangle(3).

Refill Stasis and Kinesis energy
Press Square, Triangle(2), Square, Triangle.

+2 Nodes
Press Triangle, Square(3), Triangle.

+5 Nodes
Press Triangle, Square, Triangle, Square(2), Triangle, Square(2), Triangle, Square(2), Triangle.

+1,000 Credits
Press Square(3), Triangle, Square.

Although translating that ship number into a code seems to be Down, Square(5), Triangle, Square, only the last portion of the button presses are recognized, which is the "+1,000" Credits code.

+2,000 Credits
Press Square(3), Triangle(2).

+5,000 Credits
Press Square(3), Triangle, Square, Triangle.

+10,000 Credits
Press Square, Triangle(3), Square(2), Triangle.

Successfully complete the game under the normal difficulty setting to unlock the following.

Ten Power Nodes
50,000 credits
The back story log entries
Impossible mode
Level 6 suit schematic

Do not be intimidated by its size. Though massive, it is very easy to kill. The following was done under the Medium difficulty setting. Upon starting the fight, notice you are "caged in" by the Boss' tentacles. Notice the yellow "blooms" around the Boss' mouth. Shooting each one will get you closer to killing it. However, upon shooting a few of them, the boss Grabs you, holding you in the air. During this time, it appears that you are helpless. Aim whatever weapon you are using at the time and shoot the yellow blooms. After a few shots you will be dropped. The Boss will then begin slamming its tentacles at you more frequently. They are very easy to avoid. Strafe left to right constantly. They will never hit you. The Boss will roar, shoot a few exploding cells at you, or will drop enemy pods upon you. This is part is also easy, considering it is usually only two small Necromorphs. After you destroy the blooms, you will notice a "caged" area underneath the beast. Under this rib cage lies its many hearts. Again, use same strategy with the whole tentacle scenario. After a few times, the Boss will have his fit and open up again. Unload and the Boss will come tumbling down.

The Hunter is a regenerating Necromorph that cannot be killed. The first time you encounter him is difficult, and you just have to run. It is best to shoot off his legs because he does not regenerate them immediately. He is much slower without legs. Then, freeze him and he will be taken away. When facing him again in a later act, use the same strategy then fry him with the rocket engines. Collect the Power Node that it drops.