Instructions
Launch "Dead Space" and select ̶0;Load Game̶1; to load a previously saved game or select ̶0;New Game̶1; to start a new game.
Press the ̶0;SELECT̶1; button (PlayStation 3) or ̶0;Back̶1; button (Xbox 360) once you are in control of Isaac to open a three-dimensional map of the level that you are currently in. In-game store locations are denoted as hut-shaped icons with a blue-colored circle in the middle. Travel to a store location using the map as a reference.
Press ̶0;X̶1; (PlayStation 3) or ̶0;A̶1; (Xbox 360) while standing in front of a store to access it.
Use the right and left D-Pad buttons to select the ̶0;Shop̶1; tab. Next, scroll down using the down D-Pad button and highlight the DLC suit that you want to equip.
Press ̶0;X̶1; (PlayStation 3) or ̶0;A̶1; (Xbox 360). The game will ask you buy the suit for 0 in-game credits. Press ̶0;X̶1; (PlayStation 3) or ̶0;A̶1; (Xbox 360) again to confirm. A short animation will begin to show Isaac equipping the suit.
Press ̶0;O̶1; (PlayStation 3) or ̶0;B̶1; (Xbox 360) to exit the store.