This is without doubt the best game I have ever played, and most likely the best I will ever play. It has everything: action, rpg, puzzles, blood & gore, intrigue, and even a bit of romance.
Sure it's without question the most bugged game ever developed, but the brilliance of the storyline, the believability of the concept, and the skill of (most) the voice actors more than make up for it.
Also, its one of the few games with unique dialogue based on your gender; you can play this game over and over.
A shame that while the game gets top ratings, the marketing of it sucked big time; had the company spent a few more months perfecting the game, and then made sure that people actually knew it existed, they could've made a fortune...