The Witcher is one of those role playing games you wont forget for a long time. Once you get over the first "Tutorial" level, which is really just a hurdle you have to take to get to the main story, the story just takes off! I have played a lot of RPG's like Diablo, WoW, Neverwinter Nights and Elder Scrolls, but the Witcher is by FAR the best i have experienced.
The Story is about Geralt of Rivia, which under mysterious circumstances lost all his memories. He ends up with his friends in the abandoned Witcher's School, from where you start of your journey which takes you to an intriguing quest to find out who you are.
The game is very well developed with outstanding Characters and Storyline, and very minor bugs and features missing. Another notable thing is the adult content. Swearing, Blood, Gambling and the possibility to have a relation with other NPC's are just some other things that i particularly liked.
Overall i give it a 9 of 10 because it crashes a lot under vista (no problems in XP tho) and the missing coop and multiplayer modes. I for my part like this game very much and would love to see a sequel to it.