Level selectHold [Command] + [Option] at the main menu and choose the "New Game" selection.
All weaponsHold [Command] + [Shift] and type 0wpn.
InvincibilityHold [Shift] + [Space] and type prime.
Full healthHold [Command] + [Shift] and type iv.
Full ammunitionHold [Command] + [Shift] then type a number that corresponds to a weapon, followed by wpn.
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