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Bioshock 2 Hints
Find the Second Half of the Code.
1 of 2: You'll get this goal while working on the "Find the Keycode" goal if you pick up one of the audio diaries that gives you half of the locked door's keycode.
2 of 2: Keep looking until you find the audio diary with the other half (or until you get the complete code all at once from another source).
