What is the must popular PC game in 2009

The Sims 3 was the top selling game of 2009. The top other top 9 (in order) are:


2. World of Warcraft: Wrath of the Lich King Expansion Pack
3. The Sims 2 Double Deluxe
4. World of Warcraft: Battle Chest
5. Call of Duty: Modern Warfare 2
6. World of Warcraft Blizzard Entertainment
7. The Sims 3: World Adventures Expansion Pack
8. Spore
9. Dragon Age: Origins
10. Empire: Total War