There's a GameBoomers' Review of Lost here.
I think we all assumed that this one was going to be more of a DarkSide game because of the game's description before it released. Upon release, it seems that the game is something of an adventure game. Well, here's a line from gremlin's review:
Lost: Via Domus is one of those games that falls firmly in the hybrid action adventure gap.
I think this confusion is why nobody wrote a walkthrough.