Got a review copy of the game. Seems to be a balance of free-roam and linear gameplay.
Thing is, I have never watched an episode of Lost, but I do see familar faces ingame and from the TV trailers I came across. Not sure if this game is a lift from the episodes but judging from the excellent mo-cap of characters and cutscenes, it looks like it is.
My favourite level is when you have to walk through a super-dark cave with a torch that will deplete its light after a while. You can’t see your way without the torch, and 1 torch will not last you the whole journey, especially if you tread slowly. So before going in, you have to find items to trade for torches with another castaway.