The Witcher is plagued by immaturity more than anything else,
IMO. Some versions are censored, as well.
Viva Pinata has just come out on PC (port from XBox), there's Gears of War and Unreal Tournament 3 if you're into shooters, PES 08, Guitar Hero III...
The Beyond the Sword expansion for Civ 4 is quite good, Half Life Episode 2 is great...after that, well, I think there's a remake of Speedball on the way...