It is an isometric story-driven rpg by black isle. It uses the Infinity engine, the same one used in the Baldur´s Gate and Icewind Dale series.
It is also placed in the Planescape setting for Advanced Dungeons & Dragons.
You play a Nameless character that wakes up in a morgue. No memories and a body that is horribly scarred and tattooed. I can´t really say more than that without ruining the plot though. The gameplay is like the old Fallout games. Much dialogue and story, but a bit more combat.
There are infinite ways to play the game. It goes beyond mere "good" or "evil", though that is possible to. Classes, alignments, party configurations and choices ingame make each playthrough a new experience.
Words really can´t make this game justice, so I have to urge people to at least try it. It is one of my all time favorites.