Yes, the puzzles are definitely SAW's stand-out feature. There are all kinds of fiddly mind and finger teasers, and most aren't insultingly easy. In fact, when you're puzzling against the clock in later stages the game can get quite tense. 'Boss' battles are a highlight. You fight to either free an acquaintance or save your own life by solving puzzles, which can range from block-sliding to tests of observation where you gain the combination to locks by looking at text in a mirror. Clever, but the real head-scratcher is this: do you pay full price for a dark puzzle game? Unless you really love horror porn, the answer is 'no'.