Complete playthrough. With a time-based mechanic underlying much of the puzzle design, The Tomb of Sammun-Mak plays out the events of four separate film reels that the modern-day protagonists find themselves discovering at the end of episode 1, featuring an ancestor of each. Much of the puzzle-solving relies on switching between reels, using knowledge gained from one to tackle obstacles encountered in another - and not necessarily following a forward progression of time. There's very much a feel of certain discoveries acting as the key to make headway in a series of cascading puzzles, where solving the first provides the requirement to solve the next, etc. - making the discovery of that 'key' nicely satisfying, albeit a couple of times being somewhat obscure (not all that unusual for the series!). I'm really enjoying some of the characters that we see introduced and/or developed upon here, each wonderfully characterful, with the series typical fantastic writing once again a highlight.