In this darkly atmospheric game, you play as two different characters bound on a train. The game allows you to switch back and forth between these characters.
The main gameplay is set in two seemingly disconnected areas: a giant pit of hell, and a vast machine chewing up the earth and feeding it to a horrible beast.
In both areas, you are trying to collect pieces of yourself or your memories. Painful recollections come to mind.
This game is nonintuitive; there are some pretty crazy leaps you have to make to get the game started. The very biggest leap (which you need to know pretty early on) is that (Spoiler - click to show)by destroying something in one world, you can make it appear in another. A much milder spoiler is the command to switch between worlds: (Spoiler - click to show)BE [PERSON].
I got one bad ending and one good ending. I like this kind of story. If you like this game, you may like Sentencing Mr. Liddell.