Best-selling PC Games of 2007, by units sold
1. World of Warcraft: Burning Crusade Expansion Pack--Vivendi Games--2.25 million
2. World of Warcraft--Vivendi Games--914,000
3. The Sims 2: Seasons Expansion Pack--Electronic Arts--433,000
4. Call of Duty 4: Modern Warfare--Activision--383,000
5. Command & Conquer 3: Tiberium Wars--Electronic Arts--343,000
6. Sim City 4 Deluxe--Electronic Arts--284,000
7. The Sims 2--Electronic Arts--281,000
8. The Sims 2: Bon Voyage Expansion Pack--Electronic Arts--271,000
9. Age of Empires III--Microsoft--259,000
10. The Sims 2: Pets Expansion Pack--Electronic Arts--236,000