Top 10 Best-Selling PC Games of All-Time

1. The Sims - 16+ million sold
2. The Sims 2 - 13+ million sold
3. World of Warcraft - 11+ million sold
4. Starcraft - 11+ million sold
5. Half-Life - 9+ million sold
6. Half-Life 2 - 9+ million sold
7. Myst - 6+ million sold
8. SimCity 3000 - 5+ million sold
9. Doom - 5+ million sold
10. The Sims 3 - 4+ million sold

Source: Wikipedia