Call of Duty 4 outsold Crysis by a factor of about 3:1 during December, while Crysis was outsold by two Sims games and three World of Warcraft SKUs, but still ended up in the official number two slot on the chart thanks to its high sticker price and the chart being ranked by revenue generated.
1) Call of Duty 4: Modern Warfare
2) Crysis
3) World of Warcraft: Battle Chest
4) The Orange Box
5) The Sims 2: Bon Voyage Expansion Pack
6) World of Warcraft: The Burning Crusade
7) Sim City 5: Societies
8) Guitar Hero III: Legends of Rock With Guitar
9) The Sims 2 Deluxe
10) World of Warcraft
Source: NPD PC December 2007 Games Sales Chart
http://ve3d.ign.com/articles/news/36222/Call-of-Duty-4-Spanks-Crysis