Cheat mode - At the main menu, press Circle, Left,
Right, Circle, Up, R2. A "Cheat" selection will appear
on the options screen, allowing God mode, all weapons,
infinite ammunition, infinite oxygen, no chestbursting,
and level selection.
Research mode - At the main menu, press Square, Up,
Down, Circle, Left, R1. A "Research Mode" selection will
appear on the options screen.
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