ighthouse is a demanding, difficult, and frequently frustrating point-and-click adventure. Its scope and complexity make Myst look like a Sunday stroll. Set in a parallel world with a mix of high-tech and organic devices, you need to use machine building logic and follow some occasionally obscure clues to solve this huge game.

You will visit unique locales, repair mechanical flying devices, command a submarine, operate a rock-drilling train, build an ion cannon, fight a dark creature, and rescue a scientist and his baby daughter.

You can follow multiple pathways to reach the same conclusion, use more than one technique to solve some puzzles, skip some sections altogether, and still finish successfully. The following walk-through takes you on what we believe is the most straightforward path through this game. Since there are so many options, we'll let you know when to save your game to give you the opportunity to do some extra exploring.