Market research company NPD Group has released its list of best-selling PC games for the week of December 21 27, 2008. Ever since it debuted, Blizzard's World of Warcraft expansion, Wrath of the Lich King, rose to the top of the sales charts; this past week was no different. Following behind in second place during the week of Christmas was The Sims 2 Double Deluxe. While this week remains very similar to the prior week, Activision's Call of Duty: World at War did drop and swap places with The Sims 2 Apartment Life.

1. World of Warcraft: Wrath of the Lich King Expansion Pack
2. The Sims 2 Double Deluxe
3. Spore
4. Left 4 Dead
5. The Sims 2 Apartment Life
6. Fallout 3
7. Call of Duty: World at War
8. World of Warcraft Battle Chest
9. The Sims 2 Mansion & Garden Stuff Expansion Pack
10. Bejewled Twist

Courtesy of NPD.

It is important to note that NPD data is merely reflecting of various US retail outlet sales. The list does not encompass a variety of digital distribution figures.