Infinity Ward's first person shooter Modern Warfare 2 continues to stay on top of Steam's weekly top 10 best selling PC games list (based on revenue). The latest list also shows Valve's zombie co-op shooter Left 4 Dead 2 remaining in its second place position. Likely due to its weekend 50 percent off sale, Runic Games' action-RPG Torchlight is in third place on the list this week.

Price cuts were also likely the reason why other games showed up on this week's list which you can check out below:

1. Modern Warfare 2 - Infinity Ward/Activision
2. Left 4 Dead 2 - Valve
3. Torchlight - Runic Games
4. Counter-Strike Source - Valve
5. Team Fortress 2 - Valve
6. Star Wars: The Force Unleashed Ultimate Sith Edition - Aspyr/LucasArts
7. The Last Remnant - Square Enix
8. Borderlands - Gearbox/2K Games
9. Global Agenda - Hi-Rez Studios
10. Dragon Age: Origins - BioWare/EA