Can you beat LIMBO without dying without any a priori knowledge? Obviously, if you know the proper path you can (there's even an achievement for it; though even that spots you 4-5 deaths). Some of the traps are obvious (bear traps, trip-wires), but others seem impenetrable without hitting them once and learning via dying. Sure, death is cheap in the game, but it makes question if I'm just not looking hard enough.
Fighting the three dart-shooters makes me question this the most.