Light's End is a great, interactive story- though lacking in gameplay (it's told by changing characters) it's still fun.
The story unfolds as you begin playing as a teenage girl, then, throughout the course of the game, using the Y button to change between characters.
By doing so, other NPCs throughout the game will react differently- which is to say, their dialogue will change, as expected, related to the individual you're playing as.
The idea is actually quite nice, and though the gameplay begins and ends with that one concept- changing between characters, it's safe to say that the story itself is enjoyable enough to make up for the lack of other gameplay elements (for instance, there's really no way to lose) and the concept is used well in certain puzzles throughout the game- it's really an old-school adventure game at heart, and for the low price of two hundred Microsoft Points, it's definitely worth playing.
Blessed Be