The second instalment in the RPG saga about the Witcher, Geralt of Rivia, features a thoroughly engrossing, mature storyline defining new standards for thought-provoking, non-linear game narration. In addition to an epic story, the game features an original, brutal combat system that uniquely combines tactical elements with dynamic action.
One of the games that will drag you inside in a couple of minutes and won't let you close it. I mean, the story is so well made that you will really will get into it. Battle system is also pretty much great.
By the way, there are complains that the first Witcher was and is better, but well, even if it is, it's older and this is yet another masterpiece you should try no matter how good the first Witcher was, at least if you are into a well written storyline or RPGs.
PS: If your PC will be able to play Wild Hunt (The Witcher 3), go ahead. Don't actually have personal experience here, but I saw some let's plays – and well, it is better, but you need a hell better computing power.