Slightly different top in Gamasutra (it uses Amazon)

PC
North America: 1. Galactic Civilizations II: Game of the Year Edition (Stardock), 2. World of Warcraft: Wrath of the Lich King (Blizzard), 3. Warhammer 40,000: Dawn of War II (THQ), 4. F.E.A.R. 2: Project Origin (Warner Bros.), 5. The Sims 2: Double Deluxe (EA Games).

http://www.gamasutra.com/php-bin/news_index.php?story=22404