This is part-game, part-novel. And it is beautiful.
There is no min/maxing, gaming the system, cheat codes. And you won't want any. You are living an amnesiac detectives life, with all of its failure and success. You will fail, and the game, and your life, will go on.
If you are looking for a fast paced game, this ain't it. It's a masterfully crafted piece of art that must be experienced, not won per se.
Art is beautiful, writing is perhaps the best I've ever seen. Sound leaves much to be desired - my only gripe.
Play it.