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All the walkthroughs I can find list only 13 secrets. Is there really a 14th as it says in the end mission stats?
This question / problem has been solved by Thaumaturgeimage
This (Steam) forum thread on the same topic has at least one respondent who indicates that the correct number is thirteen, with the change in the displayed total coming in (in that person's case) with NewDark.
Post edited February 08, 2015 by Thaumaturge