Just to clarify a bit, from memory I saw 13 puzzles that relied on sound, there are 600 puzzles in the game, you only need to beat about 250-300 (Could be less)

Just to clarify a bit, from memory I saw 13 puzzles that relied on sound, there are 600 puzzles in the game, you only need to beat about 250-300 (Could be less) of them to start the end game part. So you can definitely finish the game without sound, but if you're a perfectionist aiming for 100% you'll need to resort to outside help, which does suck. The puzzles don't even have a visual cue to let you know audio is important, so if you're not expecting it these puzzles just seem unsolvable. This and no colour blind support are probably the two biggest criticisms I have of the game.