I've been reading forums and I've seen multiple quotes that give different numbers for how many puzzles there are total, and this gets muddied a bit by the question of what actually counts as a puzzle.
It's really unclear to me how a person would know when they've completed/found everything the game has to offer in terms of puzzles and collectibles like audio/video recordings.
Is there an official count on the number of puzzles in the game in terms of what gets reported when you look at your save file? Are there other puzzles that aren't accounted for in the save file statistics? How many audio and visual recordings are there?